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+<title>CREATE TABLE</title>
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+<div class=nosearch>
+<div class="fancy_title">
+CREATE TABLE
+</div>
+<div class="fancy_toc">
+<a onclick="toggle_toc()">
+<span class="fancy_toc_mark" id="toc_mk">&#x25ba;</span>
+Table Of Contents
+</a>
+<div id="toc_sub"><div class="fancy-toc1"><a href="#syntax">1. Syntax</a></div>
+<div class="fancy-toc1"><a href="#the_create_table_command">2. The CREATE TABLE command</a></div>
+<div class="fancy-toc2"><a href="#create_table_as_select_statements">2.1. CREATE TABLE ... AS SELECT Statements</a></div>
+<div class="fancy-toc1"><a href="#column_definitions">3. Column Definitions</a></div>
+<div class="fancy-toc2"><a href="#column_data_types">3.1. Column Data Types</a></div>
+<div class="fancy-toc2"><a href="#the_default_clause">3.2. The DEFAULT clause</a></div>
+<div class="fancy-toc2"><a href="#the_collate_clause">3.3. The COLLATE clause</a></div>
+<div class="fancy-toc2"><a href="#the_generated_always_as_clause">3.4. The GENERATED ALWAYS AS clause</a></div>
+<div class="fancy-toc2"><a href="#the_primary_key">3.5. The PRIMARY KEY</a></div>
+<div class="fancy-toc2"><a href="#unique_constraints">3.6. UNIQUE constraints</a></div>
+<div class="fancy-toc2"><a href="#check_constraints">3.7. CHECK constraints</a></div>
+<div class="fancy-toc2"><a href="#not_null_constraints">3.8. NOT NULL constraints</a></div>
+<div class="fancy-toc1"><a href="#constraint_enforcement">4. Constraint enforcement</a></div>
+<div class="fancy-toc2"><a href="#response_to_constraint_violations">4.1. Response to constraint violations</a></div>
+<div class="fancy-toc1"><a href="#rowids_and_the_integer_primary_key">5. ROWIDs and the INTEGER PRIMARY KEY</a></div>
+</div>
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+
+
+
+
+<h1 id="syntax"><span>1. </span>Syntax</h1>
+
+<p><b><a href="syntax/create-table-stmt.html">create-table-stmt:</a></b>
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+ <div id='x762f8559' style='display:none;' class='imgcontainer'>
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+ <div id='x63388e3f' style='display:none;' class='imgcontainer'>
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+ <div id='xc3a841ed' style='display:none;' class='imgcontainer'>
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+</svg>
+</div>
+</div>
+<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
+<button id='xbc518e46' onclick='hideorshow("xbc518e46","x50d35530")'>show</button></p>
+ <div id='x50d35530' style='display:none;' class='imgcontainer'>
+ <div style="max-width:798px"><svg xmlns='http://www.w3.org/2000/svg' class="pikchr" viewBox="0 0 798.451 99.576">
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+<path d="M462,59L479,59A15 15 0 0 0 494 44L494,44A15 15 0 0 0 479 29L462,29A15 15 0 0 0 447 44L447,44A15 15 0 0 0 462 59Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M477,17L538,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M606,59L648,59A15 15 0 0 0 663 44L663,44A15 15 0 0 0 648 29L606,29A15 15 0 0 0 591 44L591,44A15 15 0 0 0 606 59Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<text x="627" y="44" text-anchor="middle" fill="rgb(0,0,0)" dominant-baseline="central">NULLS</text>
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+<path d="M701,59L735,59A15 15 0 0 0 750 44L750,44A15 15 0 0 0 735 29L701,29A15 15 0 0 0 686 44L686,44A15 15 0 0 0 701 59Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M750,44 L 757,44 Q 765,44 765,30 Q 765,17 775,17 L 786,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<path d="M606,97L648,97A15 15 0 0 0 663 82A15 15 0 0 0 648 67L606,67A15 15 0 0 0 591 82A15 15 0 0 0 606 97Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M663,82L680,82" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<path d="M701,97L727,97A15 15 0 0 0 742 82A15 15 0 0 0 727 67L701,67A15 15 0 0 0 686 82A15 15 0 0 0 701 97Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M742,82 L 754,82 Q 765,82 765,67 L 765,44 L 765,29" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M670,17L780,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+</svg>
+</div>
+</div>
+</div>
+<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
+<button id='x9e237ff3' onclick='hideorshow("x9e237ff3","x5cd30db8")'>show</button></p>
+ <div id='x5cd30db8' style='display:none;' class='imgcontainer'>
+ <div style="max-width:627px"><svg xmlns='http://www.w3.org/2000/svg' class="pikchr" viewBox="0 0 627.302 147.96">
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+<path d="M9,17L26,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<path d="M47,32L82,32A15 15 0 0 0 97 17A15 15 0 0 0 82 2L47,2A15 15 0 0 0 32 17A15 15 0 0 0 47 32Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<text x="65" y="17" text-anchor="middle" fill="rgb(0,0,0)" dominant-baseline="central">RAISE</text>
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+<path d="M97,17L114,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<path d="M135,32L135,32A15 15 0 0 0 150 17A15 15 0 0 0 135 2L135,2A15 15 0 0 0 120 17A15 15 0 0 0 135 32Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M207,70L285,70A15 15 0 0 0 300 55L300,55A15 15 0 0 0 285 39L207,39A15 15 0 0 0 192 55L192,55A15 15 0 0 0 207 70Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M351,70A15 15 0 0 0 366 55L366,55A15 15 0 0 0 351 39A15 15 0 0 0 336 55L336,55A15 15 0 0 0 351 70Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<text x="456" y="55" text-anchor="middle" fill="rgb(0,0,0)" dominant-baseline="central">error-message</text>
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+<path d="M579,32A15 15 0 0 0 594 17A15 15 0 0 0 579 2A15 15 0 0 0 564 17A15 15 0 0 0 579 32Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M207,32L259,32A15 15 0 0 0 274 17A15 15 0 0 0 259 2L207,2A15 15 0 0 0 192 17A15 15 0 0 0 207 32Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M456,17L553,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<path d="M207,108L249,108A15 15 0 0 0 264 92A15 15 0 0 0 249 77L207,77A15 15 0 0 0 192 92A15 15 0 0 0 207 108Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M300,92 L 307,92 Q 315,92 315,77 L 315,70 Q 315,55 322,55 L 330,55" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<path d="M207,145L229,145A15 15 0 0 0 244 130A15 15 0 0 0 229 115L207,115A15 15 0 0 0 192 130A15 15 0 0 0 207 145Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M165,77 L 165,85 Q 165,92 176,92 L 186,92" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+</svg>
+</div>
+</div>
+</div>
+<p><b><a href="syntax/foreign-key-clause.html">foreign-key-clause:</a></b>
+<button id='x210e2e56' onclick='hideorshow("x210e2e56","xc9497f25")'>show</button></p>
+ <div id='xc9497f25' style='display:none;' class='imgcontainer'>
+ <div style="max-width:648px"><svg xmlns='http://www.w3.org/2000/svg' class="pikchr" viewBox="0 0 648.158 492.48">
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+<path d="M60,70L164,70A15 15 0 0 0 179 55A15 15 0 0 0 164 39L60,39A15 15 0 0 0 45 55A15 15 0 0 0 60 70Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M217,70L306,70A15 15 0 0 0 322 55A15 15 0 0 0 306 39L217,39A15 15 0 0 0 202 55A15 15 0 0 0 217 70Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M373,70A15 15 0 0 0 388 55A15 15 0 0 0 373 39A15 15 0 0 0 358 55A15 15 0 0 0 373 70Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M599,70A15 15 0 0 0 614 55A15 15 0 0 0 599 39A15 15 0 0 0 584 55A15 15 0 0 0 599 70Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M137,32L244,32A15 15 0 0 0 259 17A15 15 0 0 0 244 2L137,2A15 15 0 0 0 122 17A15 15 0 0 0 137 32Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<polygon points="50,82 39,86 39,77" style="fill:rgb(0,0,0)"/>
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+<path d="M66,97A15 15 0 0 0 81 82L81,82A15 15 0 0 0 66 67A15 15 0 0 0 50 82L50,82A15 15 0 0 0 66 97Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M66,17L111,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+</svg>
+</div>
+</div>
+</div>
+<p><b><a href="syntax/type-name.html">type-name:</a></b>
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+ <div id='x7519f03c' style='display:none;' class='imgcontainer'>
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+<path d="M382,17L630,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+</svg>
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+</div>
+</div>
+<p><b><a href="syntax/select-stmt.html">select-stmt:</a></b>
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+ <div id='xf87bc594' style='display:none;' class='imgcontainer'>
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+</svg>
+</div>
+</div>
+</div>
+<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
+<button id='xe41e6c4a' onclick='hideorshow("xe41e6c4a","x9012f6bf")'>show</button></p>
+ <div id='x9012f6bf' style='display:none;' class='imgcontainer'>
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+<path d="M47,32L82,32A15 15 0 0 0 97 17A15 15 0 0 0 82 2L47,2A15 15 0 0 0 32 17A15 15 0 0 0 47 32Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M207,70L285,70A15 15 0 0 0 300 55L300,55A15 15 0 0 0 285 39L207,39A15 15 0 0 0 192 55L192,55A15 15 0 0 0 207 70Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M351,70A15 15 0 0 0 366 55L366,55A15 15 0 0 0 351 39A15 15 0 0 0 336 55L336,55A15 15 0 0 0 351 70Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M579,32A15 15 0 0 0 594 17A15 15 0 0 0 579 2A15 15 0 0 0 564 17A15 15 0 0 0 579 32Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M207,32L259,32A15 15 0 0 0 274 17A15 15 0 0 0 259 2L207,2A15 15 0 0 0 192 17A15 15 0 0 0 207 32Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M456,17L553,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M300,92 L 307,92 Q 315,92 315,77 L 315,70 Q 315,55 322,55 L 330,55" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<path d="M207,145L229,145A15 15 0 0 0 244 130A15 15 0 0 0 229 115L207,115A15 15 0 0 0 192 130A15 15 0 0 0 207 145Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+</div>
+</div>
+<p><b><a href="syntax/type-name.html">type-name:</a></b>
+<button id='x86060bfd' onclick='hideorshow("x86060bfd","x80512457")'>show</button></p>
+ <div id='x80512457' style='display:none;' class='imgcontainer'>
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+<p><b><a href="syntax/signed-number.html">signed-number:</a></b>
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+<path d="M137,32L244,32A15 15 0 0 0 259 17A15 15 0 0 0 244 2L137,2A15 15 0 0 0 122 17A15 15 0 0 0 137 32Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<circle cx="286" cy="17" r="3.6" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M9,17 L 16,17 Q 24,17 24,32 L 24,67 Q 24,82 34,82 L 45,82" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<path d="M66,97A15 15 0 0 0 81 82L81,82A15 15 0 0 0 66 67A15 15 0 0 0 50 82L50,82A15 15 0 0 0 66 97Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<text x="66" y="82" text-anchor="middle" font-weight="bold" fill="rgb(0,0,0)" dominant-baseline="central">-</text>
+<path d="M81,82 L 88,82 Q 96,82 96,67 L 96,44 L 96,29" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M66,17L111,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+</svg>
+</div>
+</div>
+</div>
+</div>
+<p><b><a href="syntax/join-clause.html">join-clause:</a></b>
+<button id='x09a315fc' onclick='hideorshow("x09a315fc","xe2508c7c")'>show</button></p>
+ <div id='xe2508c7c' style='display:none;' class='imgcontainer'>
+ <div style="max-width:793px"><svg xmlns='http://www.w3.org/2000/svg' class="pikchr" viewBox="0 0 793.282 84.24">
+<circle cx="5" cy="17" r="3.6" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M32,32L193,32L193,2L32,2Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<text x="112" y="17" text-anchor="middle" fill="rgb(0,0,0)" dominant-baseline="central">table-or-subquery</text>
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+<path d="M259,62L380,62L380,32L259,32Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<text x="319" y="47" text-anchor="middle" fill="rgb(0,0,0)" dominant-baseline="central">join-operator</text>
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+<path d="M403,62L564,62L564,32L403,32Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<text x="483" y="47" text-anchor="middle" fill="rgb(0,0,0)" dominant-baseline="central">table-or-subquery</text>
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+<path d="M587,62L721,62L721,32L587,32Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M721,47 L 742,47 Q 757,47 757,32 L 757,32 Q 757,17 767,17 L 778,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<circle cx="787" cy="17" r="3.6" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<polygon points="483,17 472,21 472,12" style="fill:rgb(0,0,0)"/>
+<path d="M193,17L478,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<path d="M483,17L776,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<polygon points="483,77 495,73 495,82" style="fill:rgb(0,0,0)"/>
+<path d="M721,47 L 728,47 Q 736,47 736,62 L 736,62 Q 736,77 721,77 L 504,77 L 489,77" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<path d="M483,77 L 247,77 Q 232,77 232,62 L 232,62 Q 232,47 246,47 L 259,47" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+</svg>
+</div>
+<p><b><a href="syntax/join-constraint.html">join-constraint:</a></b>
+<button id='xef7e6d1a' onclick='hideorshow("xef7e6d1a","xb2dd602e")'>show</button></p>
+ <div id='xb2dd602e' style='display:none;' class='imgcontainer'>
+ <div style="max-width:483px"><svg xmlns='http://www.w3.org/2000/svg' class="pikchr" viewBox="0 0 483.336 126.576">
+<circle cx="5" cy="17" r="3.6" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M9,17 L 16,17 Q 24,17 24,32 L 24,40 Q 24,55 34,55 L 45,55" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<path d="M66,70L104,70A15 15 0 0 0 120 55L120,55A15 15 0 0 0 104 39L66,39A15 15 0 0 0 50 55L50,55A15 15 0 0 0 66 70Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M158,70A15 15 0 0 0 173 55L173,55A15 15 0 0 0 158 39A15 15 0 0 0 143 55L143,55A15 15 0 0 0 158 70Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M224,70L318,70A15 15 0 0 0 333 55L333,55A15 15 0 0 0 318 39L224,39A15 15 0 0 0 209 55L209,55A15 15 0 0 0 224 70Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M384,70A15 15 0 0 0 399 55L399,55A15 15 0 0 0 384 39A15 15 0 0 0 369 55L369,55A15 15 0 0 0 384 70Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<circle cx="477" cy="17" r="3.6" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M66,32L74,32A15 15 0 0 0 90 17A15 15 0 0 0 74 2L66,2A15 15 0 0 0 50 17A15 15 0 0 0 66 32Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<text x="70" y="17" text-anchor="middle" fill="rgb(0,0,0)" dominant-baseline="central">ON</text>
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+<path d="M90,17L107,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<path d="M113,32L162,32L162,2L113,2Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M422,17L462,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+</div>
+</div>
+<p><b><a href="syntax/join-operator.html">join-operator:</a></b>
+<button id='xe8d58aba' onclick='hideorshow("xe8d58aba","xecbea229")'>show</button></p>
+ <div id='xecbea229' style='display:none;' class='imgcontainer'>
+ <div style="max-width:620px"><svg xmlns='http://www.w3.org/2000/svg' class="pikchr" viewBox="0 0 620.333 255.312">
+<circle cx="5" cy="17" r="3.6" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M9,17 L 16,17 Q 24,17 24,32 L 24,56 Q 24,71 34,71 L 45,71" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<path d="M66,86L133,86A15 15 0 0 0 148 71A15 15 0 0 0 133 56L66,56A15 15 0 0 0 50 71A15 15 0 0 0 66 86Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M246,86L273,86A15 15 0 0 0 288 71A15 15 0 0 0 273 56L246,56A15 15 0 0 0 231 71A15 15 0 0 0 246 86Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M393,86L437,86A15 15 0 0 0 452 71A15 15 0 0 0 437 56L393,56A15 15 0 0 0 378 71A15 15 0 0 0 393 86Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M475,71 L 482,71 Q 490,71 490,56 L 490,56 Q 490,41 500,41 L 511,41" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<path d="M532,56L554,56A15 15 0 0 0 569 41A15 15 0 0 0 554 26L532,26A15 15 0 0 0 516 41A15 15 0 0 0 532 56Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M246,124L284,124A15 15 0 0 0 299 109A15 15 0 0 0 284 94L246,94A15 15 0 0 0 231 109A15 15 0 0 0 246 124Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M246,162L274,162A15 15 0 0 0 289 147A15 15 0 0 0 274 132L246,132A15 15 0 0 0 231 147A15 15 0 0 0 246 162Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M246,207L287,207A15 15 0 0 0 302 192A15 15 0 0 0 287 177L246,177A15 15 0 0 0 231 192A15 15 0 0 0 246 207Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M475,192 L 482,192 Q 490,192 490,185 L 490,177" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M246,253L287,253A15 15 0 0 0 303 238A15 15 0 0 0 287 222L246,222A15 15 0 0 0 231 238A15 15 0 0 0 246 253Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+<path d="M475,238 L 482,238 Q 490,238 490,223 L 490,71 L 490,56" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+</div>
+</div>
+</div>
+<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
+<button id='x7c0e37e3' onclick='hideorshow("x7c0e37e3","xf47be615")'>show</button></p>
+ <div id='xf47be615' style='display:none;' class='imgcontainer'>
+ <div style="max-width:798px"><svg xmlns='http://www.w3.org/2000/svg' class="pikchr" viewBox="0 0 798.451 99.576">
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+<path d="M126,59L190,59A15 15 0 0 0 205 44L205,44A15 15 0 0 0 190 29L126,29A15 15 0 0 0 111 44L111,44A15 15 0 0 0 126 59Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
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+</div>
+</div>
+<p><b><a href="syntax/window-defn.html">window-defn:</a></b>
+<button id='x8fdd1e91' onclick='hideorshow("x8fdd1e91","xec9d44d1")'>show</button></p>
+ <div id='xec9d44d1' style='display:none;' class='imgcontainer'>
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+ <div id='x7c782c20' style='display:none;' class='imgcontainer'>
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+<p><b><a href="syntax/table-constraint.html">table-constraint:</a></b>
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+<p><b><a href="syntax/function-arguments.html">function-arguments:</a></b>
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+ <div id='x4d172088' style='display:none;' class='imgcontainer'>
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+<p><b><a href="syntax/ordering-term.html">ordering-term:</a></b>
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+</div>
+<p><b><a href="syntax/raise-function.html">raise-function:</a></b>
+<button id='xed8e0ad8' onclick='hideorshow("xed8e0ad8","xb9154ac3")'>show</button></p>
+ <div id='xb9154ac3' style='display:none;' class='imgcontainer'>
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+<p><b><a href="syntax/type-name.html">type-name:</a></b>
+<button id='x540ffe19' onclick='hideorshow("x540ffe19","x0538c621")'>show</button></p>
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+<polygon points="687,17 675,21 675,12" style="fill:rgb(0,0,0)"/>
+<path d="M645,85 L 652,85 Q 660,85 660,70 L 660,32 Q 660,17 670,17 L 681,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<circle cx="690" cy="17" r="3.6" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<polygon points="50,55 39,59 39,50" style="fill:rgb(0,0,0)"/>
+<path d="M9,17 L 16,17 Q 24,17 24,32 L 24,40 Q 24,55 34,55 L 45,55" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<path d="M50,70L100,70L100,39L50,39Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<text x="75" y="55" text-anchor="middle" fill="rgb(0,0,0)" dominant-baseline="central">expr</text>
+<polygon points="175,55 163,59 163,50" style="fill:rgb(0,0,0)"/>
+<path d="M100,55L169,55" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<path d="M175,55 L 182,55 Q 190,55 190,40 L 190,32 Q 190,17 197,17 L 205,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<polygon points="358,17 346,21 346,12" style="fill:rgb(0,0,0)"/>
+<path d="M175,17L352,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<polygon points="597,17 586,21 586,12" style="fill:rgb(0,0,0)"/>
+<path d="M358,17L592,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<path d="M597,17L675,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<path d="M582,62L599,62A15 15 0 0 0 614 47A15 15 0 0 0 599 32L582,32A15 15 0 0 0 567 47A15 15 0 0 0 582 62Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<text x="591" y="47" text-anchor="middle" fill="rgb(0,0,0)" dominant-baseline="central">ASC</text>
+<polygon points="645,47 633,51 633,43" style="fill:rgb(0,0,0)"/>
+<path d="M614,47L639,47" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<path d="M645,47 L 652,47 Q 660,47 660,40 L 660,32" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<polygon points="567,47 556,51 556,43" style="fill:rgb(0,0,0)"/>
+<path d="M541,32 L 541,39 Q 541,47 551,47 L 561,47" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+</svg>
+</div>
+</div>
+</div>
+<p><b><a href="syntax/table-options.html">table-options:</a></b>
+<button id='x8c53d577' onclick='hideorshow("x8c53d577","x9308c71a")'>show</button></p>
+ <div id='x9308c71a' style='display:none;' class='imgcontainer'>
+ <div style="max-width:324px"><svg xmlns='http://www.w3.org/2000/svg' class="pikchr" viewBox="0 0 324.036 98.31">
+<circle cx="5" cy="36" r="3.6" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<polygon points="77,17 66,21 66,12" style="fill:rgb(0,0,0)"/>
+<path d="M9,36 L 40,36 Q 55,36 55,26 Q 55,17 63,17 L 72,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<path d="M93,32L161,32A15 15 0 0 0 177 17A15 15 0 0 0 161 2L93,2A15 15 0 0 0 77 17A15 15 0 0 0 93 32Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<text x="127" y="17" text-anchor="middle" fill="rgb(0,0,0)" dominant-baseline="central">WITHOUT</text>
+<polygon points="194,17 182,21 182,12" style="fill:rgb(0,0,0)"/>
+<path d="M177,17L188,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<path d="M209,32L253,32A15 15 0 0 0 268 17A15 15 0 0 0 253 2L209,2A15 15 0 0 0 194 17A15 15 0 0 0 209 32Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<text x="231" y="17" text-anchor="middle" fill="rgb(0,0,0)" dominant-baseline="central">ROWID</text>
+<path d="M268,17 L 274,17 Q 280,17 280,26 Q 280,36 295,36 L 299,36 L 314,36" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<circle cx="318" cy="36" r="3.6" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<polygon points="77,54 66,59 66,50" style="fill:rgb(0,0,0)"/>
+<path d="M9,36 L 40,36 Q 55,36 55,45 Q 55,54 63,54 L 72,54" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<path d="M93,69L139,69A15 15 0 0 0 154 54A15 15 0 0 0 139 39L93,39A15 15 0 0 0 77 54A15 15 0 0 0 93 69Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<text x="116" y="54" text-anchor="middle" fill="rgb(0,0,0)" dominant-baseline="central">STRICT</text>
+<polygon points="314,36 303,40 303,31" style="fill:rgb(0,0,0)"/>
+<path d="M154,54 L 253,54 Q 268,54 274,54 Q 280,54 280,45 Q 280,36 294,36 L 308,36" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<polygon points="194,81 205,76 205,85" style="fill:rgb(0,0,0)"/>
+<path d="M285,36 L 293,36 Q 300,36 300,51 L 300,66 Q 300,81 285,81 L 215,81 L 200,81" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<path d="M179,96A15 15 0 0 0 194 81A15 15 0 0 0 179 65A15 15 0 0 0 164 81A15 15 0 0 0 179 96Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<text x="179" y="81" text-anchor="middle" fill="rgb(0,0,0)" dominant-baseline="central">,</text>
+<polygon points="77,81 89,76 89,85" style="fill:rgb(0,0,0)"/>
+<path d="M164,81L83,81" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+<path d="M77,81 L 31,81 Q 16,81 16,66 L 16,51 Q 16,36 28,36 L 39,36" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" />
+</svg>
+</div>
+</div>
+</div>
+
+
+<h1 id="the_create_table_command"><span>2. </span>The CREATE TABLE command</h1>
+
+<p>The "CREATE TABLE" command is used to create a new table in an SQLite
+database. A CREATE TABLE command specifies the following attributes of the
+new table:
+
+</p><ul>
+ <li><p>The name of the new table.
+
+ </p></li><li><p> The database in which the new table is created. Tables may be
+ created in the main database, the temp database, or in any attached
+ database.
+
+ </p></li><li><p> The name of each column in the table.
+
+ </p></li><li><p> The declared type of each column in the table.
+
+ </p></li><li><p> A default value or expression for each column in the table.
+
+ </p></li><li><p> A default collation sequence to use with each column.
+
+ </p></li><li><p> Optionally, a PRIMARY KEY for the table. Both single column and
+ composite (multiple column) primary keys are supported.
+
+ </p></li><li><p> A set of SQL constraints for each table. SQLite supports UNIQUE, NOT
+ NULL, CHECK and FOREIGN KEY constraints.
+
+ </p></li><li><p> Optionally, a <a href="gencol.html">generated column</a> constraint.
+
+ </p></li><li><p> Whether the table is a <a href="withoutrowid.html">WITHOUT ROWID</a> table.
+
+ </p></li><li><p> Whether the table is subject to <a href="stricttables.html">strict type checking</a>.
+</p></li></ul>
+
+<p>Every CREATE TABLE statement must specify a name for the new table.
+ Table names that begin with "sqlite_" are reserved for internal use. It
+ is an error to attempt to create a table with a name that starts with
+ "sqlite_".
+
+</p><p> If a <span class='yyterm'>schema-name</span> is specified, it must be either "main",
+ "temp", or the name of an <a href="lang_attach.html">attached database</a>. In this case
+ the new table is created in the named database. If the "TEMP" or "TEMPORARY"
+ keyword occurs between the "CREATE" and "TABLE" then the new table is
+ created in the temp database. It is an error to specify both a
+ <span class='yyterm'>schema-name</span> and the TEMP or TEMPORARY keyword, unless the
+ <span class='yyterm'>schema-name</span> is "temp".
+ If no schema name is specified and the
+ TEMP keyword is not present then the table is created in the main
+ database.
+
+</p><p>
+ It is usually an error to attempt to create a new table in a database that
+ already contains a table, index or view of the same name. However, if the
+ "IF NOT EXISTS" clause is specified as part of the CREATE TABLE statement and
+ a table or view of the same name already exists, the CREATE TABLE command
+ simply has no effect (and no error message is returned). An error is still
+ returned if the table cannot be created because of an existing index, even
+ if the "IF NOT EXISTS" clause is specified.
+
+</p><p>It is not an error to create a table that has the same name as an
+ existing <a href="lang_createtrigger.html">trigger</a>.
+
+</p><p>Tables are removed using the <a href="lang_droptable.html">DROP TABLE</a> statement. </p>
+
+<a name="createtabas"></a>
+
+<h2 id="create_table_as_select_statements"><span>2.1. </span>CREATE TABLE ... AS SELECT Statements</h2>
+
+<p>A "CREATE TABLE ... AS SELECT" statement creates and populates a database
+table based on the results of a SELECT statement. The table has the same
+number of columns as the rows returned by the SELECT statement. The name of
+each column is the same as the name of the corresponding column in the result
+set of the SELECT statement. The declared type of each column is determined
+by the <a href="datatype3.html#expraff">expression affinity</a> of the corresponding expression in the result set
+of the SELECT statement, as follows:
+</p>
+
+<center><table border="1">
+ <tr><th>Expression Affinity </th><th>Column Declared Type
+ </th></tr><tr><td>TEXT </td><td>"TEXT"
+ </td></tr><tr><td>NUMERIC </td><td>"NUM"
+ </td></tr><tr><td>INTEGER </td><td>"INT"
+ </td></tr><tr><td>REAL </td><td>"REAL"
+ </td></tr><tr><td>BLOB (a.k.a "NONE") </td><td>"" (empty string)
+</td></tr></table></center>
+
+<p>A table created using CREATE TABLE AS has no PRIMARY KEY and no
+constraints of any kind. The default value of each column is NULL. The default
+collation sequence for each column of the new table is BINARY.
+
+</p><p>Tables created using CREATE TABLE AS are initially populated with the
+rows of data returned by the SELECT statement. Rows are assigned contiguously
+ascending <a href="lang_createtable.html#rowid">rowid</a> values, starting with 1, in the <a href="lang_select.html#orderby">order</a> that they
+are returned by the SELECT statement.
+
+<a name="tablecoldef"></a>
+
+</p><h1 id="column_definitions"><span>3. </span>Column Definitions</h1>
+
+<p>Unless it is a CREATE TABLE ... AS SELECT statement, a CREATE TABLE includes
+one or more <a href="syntax/column-def.html">column definitions</a>, optionally followed by a list of
+<a href="syntax/table-constraint.html">table constraints</a>. Each column definition consists of the
+name of the column, optionally followed by the declared type of the column,
+then one or more optional <a href="syntax/column-constraint.html">column constraints</a>. Included in
+the definition of "column constraints" for the purposes of the previous
+statement are the COLLATE and DEFAULT clauses, even though these are not really
+constraints in the sense that they do not restrict the data that the table may
+contain. The other constraints - NOT NULL, CHECK, UNIQUE, PRIMARY KEY and
+FOREIGN KEY constraints - impose restrictions on the table data.
+
+</p><p>The number of columns in a table is limited by the <a href="limits.html#max_column">SQLITE_MAX_COLUMN</a>
+compile-time parameter. A single row of a table cannot store more than
+<a href="limits.html#max_length">SQLITE_MAX_LENGTH</a> bytes of data. Both of these limits can be lowered at
+runtime using the <a href="c3ref/limit.html">sqlite3_limit()</a> C/C++ interface.</p>
+
+<h2 id="column_data_types"><span>3.1. </span>Column Data Types</h2>
+
+<p>Unlike most SQL databases, SQLite does not restrict the type of data that
+may be inserted into a column based on the columns declared type. Instead,
+SQLite uses <a href="datatype3.html">dynamic typing</a>. The declared type of a column is used to
+determine the <a href="datatype3.html#affinity">affinity</a> of the column only.
+
+<a name="dfltval"></a>
+
+</p><h2 id="the_default_clause"><span>3.2. </span>The DEFAULT clause</h2>
+<p>The DEFAULT clause specifies a default value to use for the column if no
+value is explicitly provided by the user when doing an <a href="lang_insert.html">INSERT</a>. If there
+is no explicit DEFAULT clause attached to a column definition, then the
+default value of the column is NULL. An explicit DEFAULT clause may specify
+that the default value is NULL, a string constant, a blob constant, a
+signed-number, or any constant expression enclosed in parentheses. A
+default value may also be one of the special case-independent keywords
+CURRENT_TIME, CURRENT_DATE or CURRENT_TIMESTAMP. For the purposes of the
+DEFAULT clause, an expression is considered constant if it
+contains no sub-queries, column or table references, <a href="lang_expr.html#varparam">bound parameters</a>,
+or string literals enclosed in double-quotes instead of single-quotes.
+
+</p><p>Each time a row is inserted into the table by an INSERT statement that
+does not provide explicit values for all table columns the values stored in
+the new row are determined by their default values, as follows:
+
+</p><ul>
+ <li><p>If the default value of the column is a constant NULL, text, blob or
+ signed-number value, then that value is used directly in the new row.
+
+ </p></li><li><p>If the default value of a column is an expression in parentheses, then
+ the expression is evaluated once for each row inserted and the results
+ used in the new row.
+
+ </p></li><li><p>If the default value of a column is CURRENT_TIME, CURRENT_DATE or
+ CURRENT_TIMESTAMP, then the value used in the new row is a text
+ representation of the current UTC date and/or time. For CURRENT_TIME, the
+ format of the value is "HH:MM:SS". For CURRENT_DATE, "YYYY-MM-DD". The
+ format for CURRENT_TIMESTAMP is "YYYY-MM-DD HH:MM:SS".
+</p></li></ul>
+
+<a name="collateclause"></a>
+
+<h2 id="the_collate_clause"><span>3.3. </span>The COLLATE clause</h2>
+<p>The COLLATE clause specifies the name of a <a href="datatype3.html#collation">collating sequence</a> to use as
+the default collation sequence for the column. If no COLLATE clause is
+specified, the default collation sequence is <a href="datatype3.html#collation">BINARY</a>.
+
+</p><h2 id="the_generated_always_as_clause"><span>3.4. </span>The GENERATED ALWAYS AS clause</h2>
+<p>A column that includes a GENERATED ALWAYS AS clause is a <a href="gencol.html">generated column</a>.
+Generated columns are supported beginning with SQLite version 3.31.0 (2020-01-22).
+See the <a href="gencol.html">separate documentation</a> for details on the capabilities and
+limitations of generated columns.
+
+<a name="primkeyconst"></a>
+
+</p><h2 id="the_primary_key"><span>3.5. </span>The PRIMARY KEY</h2>
+<p>Each table in SQLite may have at most one PRIMARY KEY. If the
+ keywords PRIMARY KEY are added to a column definition, then the primary key
+ for the table consists of that single column. Or, if a PRIMARY KEY clause
+ is specified as a <a href="syntax/table-constraint.html">table-constraint</a>, then the primary key of the table
+ consists of the list of columns specified as part of the PRIMARY KEY clause.
+ The PRIMARY KEY clause must contain only column names &mdash; the use of
+ expressions in an <a href="syntax/indexed-column.html">indexed-column</a> of a PRIMARY KEY is not supported.
+ An error is raised if more than one PRIMARY KEY clause appears in a
+ CREATE TABLE statement. The PRIMARY KEY is optional for ordinary tables
+ but is required for <a href="withoutrowid.html">WITHOUT ROWID</a> tables.
+
+</p><p>If a table has a single column primary key and the declared type of that
+ column is "INTEGER" and the table is not a <a href="withoutrowid.html">WITHOUT ROWID</a> table,
+ then the column is known as an <a href="lang_createtable.html#rowid">INTEGER PRIMARY KEY</a>.
+ See <a href="lang_createtable.html#rowid">below</a> for a description of the special properties and behaviors
+ associated with an <a href="lang_createtable.html#rowid">INTEGER PRIMARY KEY</a>.
+
+</p><p>Each row in a table with a primary key must have a unique combination
+ of values in its primary key columns. For the purposes of determining
+ the uniqueness of primary key values, NULL values are considered distinct from
+ all other values, including other NULLs. If an <a href="lang_insert.html">INSERT</a> or <a href="lang_update.html">UPDATE</a>
+ statement attempts to modify the table content so that two or more rows
+ have identical primary key values, that is a constraint violation.
+
+</p><p> According to the SQL standard, PRIMARY KEY should always imply NOT NULL.
+ Unfortunately, due to a bug in some early versions, this is not the
+ case in SQLite. Unless the column is an <a href="lang_createtable.html#rowid">INTEGER PRIMARY KEY</a> or
+ the table is a <a href="withoutrowid.html">WITHOUT ROWID</a> table or a <a href="stricttables.html">STRICT</a> table
+ or the column is declared NOT NULL,
+ SQLite allows NULL values in a PRIMARY KEY column. SQLite could be fixed to
+ conform to the standard, but doing so might break legacy applications.
+ Hence, it has been decided to merely document the fact that SQLite
+ allows NULLs in most PRIMARY KEY columns.
+
+<a name="uniqueconst"></a>
+
+</p><h2 id="unique_constraints"><span>3.6. </span>UNIQUE constraints</h2>
+<p>A UNIQUE constraint is similar to a PRIMARY KEY constraint, except
+ that a single table may have any number of UNIQUE constraints. For each
+ UNIQUE constraint on the table, each row must contain a unique combination
+ of values in the columns identified by the UNIQUE constraint.
+ For the purposes of UNIQUE constraints, NULL values
+ are considered distinct from all other values, including other NULLs.
+ As with PRIMARY KEYs, a UNIQUE <a href="syntax/table-constraint.html">table-constraint</a> clause must contain
+ only column names &mdash; the use of
+ expressions in an <a href="syntax/indexed-column.html">indexed-column</a> of a UNIQUE <a href="syntax/table-constraint.html">table-constraint</a>
+ is not supported.
+
+
+</p><p>In most cases, UNIQUE and PRIMARY KEY
+ constraints are implemented by creating a unique index in the database.
+ (The exceptions are <a href="lang_createtable.html#rowid">INTEGER PRIMARY KEY</a> and PRIMARY KEYs on
+ <a href="withoutrowid.html">WITHOUT ROWID</a> tables.)
+ Hence, the following schemas are logically equivalent:
+
+ </p><ol>
+ <li><p>CREATE TABLE t1(a, b UNIQUE);
+ </p></li><li><p>CREATE TABLE t1(a, b PRIMARY KEY);
+ </p></li><li><p>CREATE TABLE t1(a, b);<br>
+ CREATE UNIQUE INDEX t1b ON t1(b);
+ </p></li></ol>
+
+<a name="ckconst"></a>
+
+<h2 id="check_constraints"><span>3.7. </span>CHECK constraints</h2>
+<p>A CHECK constraint may be attached to a column definition or
+ specified as a table constraint. In practice it makes no difference. Each
+ time a new row is inserted into the table or an existing row is updated,
+ the expression associated with each CHECK constraint is evaluated and
+ cast to a NUMERIC value in the same way as a <a href="lang_expr.html#castexpr">CAST expression</a>. If the
+ result is zero (integer value 0 or real value 0.0), then a constraint
+ violation has occurred. If the CHECK expression evaluates to NULL, or
+ any other non-zero value, it is not a constraint violation.
+ The expression of a CHECK constraint may not contain a subquery.
+
+</p><p>CHECK constraints are only verified when the table is written, not when
+ it is read. Furthermore, verification of CHECK constraints can be
+ temporarily disabled using the "<a href="pragma.html#pragma_ignore_check_constraints">PRAGMA ignore_check_constraints=ON;</a>"
+ statement. Hence, it is possible that a query might produce results that
+ violate the CHECK constraints.
+
+<a name="notnullconst"></a>
+
+</p><h2 id="not_null_constraints"><span>3.8. </span>NOT NULL constraints</h2>
+<p>A NOT NULL constraint may only be attached to a column definition,
+ not specified as a table constraint. Not surprisingly, a NOT NULL
+ constraint dictates that the associated column may not contain a NULL value.
+ Attempting to set the column value to NULL when inserting a new row or
+ updating an existing one causes a constraint violation. NOT NULL
+ constraints are not verified during queries, so a query of a column might
+ produce a NULL value even though the column is marked as NOT NULL, if the
+ database file is corrupt.
+
+
+</p><h1 id="constraint_enforcement"><span>4. </span>Constraint enforcement</h1>
+
+<p>Constraints are checked during <a href="lang_insert.html">INSERT</a> and <a href="lang_update.html">UPDATE</a> and by
+<a href="pragma.html#pragma_integrity_check">PRAGMA integrity_check</a> and <a href="pragma.html#pragma_quick_check">PRAGMA quick_check</a> and sometimes
+by <a href="lang_altertable.html">ALTER TABLE</a>. Queries and <a href="lang_delete.html">DELETE</a>
+statements do not normally verify constraints.
+Hence, if a database file has been corrupted (perhaps by an external
+program making direct changes to the database file without going through
+the SQLite library) a query might return data that violates a constraint.
+For example:
+
+</p><div class="codeblock"><pre>CREATE TABLE t1(x INT CHECK( x>3 ));
+/* Insert a row with X less than 3 by directly writing into the
+** database file using an external program */
+PRAGMA integrity_check; -- Reports row with x less than 3 as corrupt
+INSERT INTO t1(x) VALUES(2); -- Fails with SQLITE_CORRUPT
+SELECT x FROM t1; -- Returns an integer less than 3 in spite of the CHECK constraint
+</pre></div>
+
+<p>Enforcement of CHECK constraints can be temporarily disabled using
+the <a href="pragma.html#pragma_ignore_check_constraints">PRAGMA ignore_check_constraints=ON;</a> statement.
+
+</p><h2 id="response_to_constraint_violations"><span>4.1. </span>Response to constraint violations</h2>
+
+<p>The response to a constraint violation is determined by the
+ <a href="lang_conflict.html">constraint conflict resolution algorithm</a>. Each
+ PRIMARY KEY, UNIQUE, NOT NULL and CHECK constraint has a default conflict
+ resolution algorithm. PRIMARY KEY, UNIQUE and NOT NULL constraints may be
+ explicitly assigned another default conflict resolution algorithm by
+ including a <a href="syntax/conflict-clause.html">conflict-clause</a> in their definitions.
+ Or, if a constraint definition does not include a <a href="syntax/conflict-clause.html">conflict-clause</a>,
+ the default conflict resolution algorithm is ABORT.
+ The conflict resolution algorithm for CHECK constraints is always ABORT.
+ (For historical compatibility only, table CHECK constraints are allowed
+ to have a conflict resolution clause, but that has no effect.)
+ Different constraints within the
+ same table may have different default conflict resolution algorithms. See
+ the section titled <a href="lang_conflict.html">ON CONFLICT</a> for additional information.
+
+<a name="rowid"></a>
+
+</p><h1 id="rowids_and_the_integer_primary_key"><span>5. </span>ROWIDs and the INTEGER PRIMARY KEY</h1>
+
+<p>Except for <a href="withoutrowid.html">WITHOUT ROWID</a> tables, all rows within SQLite tables
+have a 64-bit signed integer key that uniquely identifies the row within its table.
+This integer is usually
+called the "rowid". The rowid value can be accessed using one of the special
+case-independent names "rowid", "oid", or "_rowid_" in place of a column name.
+If a table contains a user defined column named "rowid", "oid" or "_rowid_",
+then that name always refers the explicitly declared column and cannot be used
+to retrieve the integer rowid value.
+
+</p><p>The rowid (and "oid" and "_rowid_") is omitted in <a href="withoutrowid.html">WITHOUT ROWID</a> tables.
+WITHOUT ROWID tables are only available in SQLite <a href="releaselog/3_8_2.html">version 3.8.2</a>
+(2013-12-06) and later.
+A table that lacks the WITHOUT ROWID clause is called a "rowid table".
+
+</p><p>The data for rowid tables is stored as a B-Tree structure containing
+one entry for each table row, using the rowid value as the key. This means that
+retrieving or sorting records by rowid is fast. Searching for a record with a
+specific rowid, or for all records with rowids within a specified range is
+around twice as fast as a similar search made by specifying any other PRIMARY
+KEY or indexed value.
+
+</p><p> With one exception noted below, if a rowid table has a primary key that consists
+of a single column and the declared type of that column is "INTEGER" in any mixture of
+upper and lower case, then the column becomes an alias for the rowid. Such a
+column is usually referred to as an "integer primary key". A PRIMARY KEY column
+only becomes an integer primary key if the declared type name is exactly
+"INTEGER". Other integer type names like "INT" or "BIGINT" or "SHORT INTEGER"
+or "UNSIGNED INTEGER" causes the primary key column to behave as an ordinary
+table column with integer <a href="datatype3.html#affinity">affinity</a> and a unique index, not as an alias for
+the rowid.
+
+</p><p> The exception mentioned above is that if the declaration of a column with
+declared type "INTEGER" includes an "PRIMARY KEY DESC" clause, it does not
+become an alias for the rowid and is not classified as an integer primary key.
+This quirk is not by design. It is due to a bug in early versions of SQLite.
+But fixing the bug could result in backwards incompatibilities.
+Hence, the original behavior has been retained (and documented) because odd
+behavior in a corner case is far better than a compatibility break. This means
+that the following three table declarations all cause the column "x" to be an
+alias for the rowid (an integer primary key):
+
+</p><ul>
+<li><tt>CREATE TABLE t(x INTEGER PRIMARY KEY ASC, y, z);</tt>
+</li><li><tt>CREATE TABLE t(x INTEGER, y, z, PRIMARY KEY(x ASC));</tt>
+</li><li><tt>CREATE TABLE t(x INTEGER, y, z, PRIMARY KEY(x DESC));</tt>
+</li></ul>
+
+<p>But the following declaration does not result in "x" being an alias for
+the rowid:
+</p><ul>
+<li><tt>CREATE TABLE t(x INTEGER PRIMARY KEY DESC, y, z);</tt>
+</li></ul>
+
+<p>Rowid values may be modified using an UPDATE statement in the same
+way as any other column value can, either using one of the built-in aliases
+("rowid", "oid" or "_rowid_") or by using an alias created by an integer
+primary key. Similarly, an INSERT statement may provide a value to use as the
+rowid for each row inserted. Unlike normal SQLite columns, an integer primary
+key or rowid column must contain integer values. Integer primary key or rowid
+columns are not able to hold floating point values, strings, BLOBs, or NULLs.
+
+</p><p>If an UPDATE statement attempts to set an integer primary key or rowid column
+to a NULL or blob value, or to a string or real value that cannot be losslessly
+converted to an integer, a "datatype mismatch" error occurs and the statement
+is aborted. If an INSERT statement attempts to insert a blob value, or a string
+or real value that cannot be losslessly converted to an integer into an
+integer primary key or rowid column, a "datatype mismatch" error occurs and the
+statement is aborted.
+
+</p><p>If an INSERT statement attempts to insert a NULL value into a rowid or
+integer primary key column, the system chooses an integer value to use as the
+rowid automatically. A detailed description of how this is done is provided
+<a href="autoinc.html">separately</a>.</p>
+
+<p>The <a href="foreignkeys.html#parentchild">parent key</a> of a <a href="foreignkeys.html">foreign key constraint</a> is not allowed to
+use the rowid. The parent key must used named columns only.</p>
+<p align="center"><small><i>This page last modified on <a href="https://sqlite.org/docsrc/honeypot" id="mtimelink" data-href="https://sqlite.org/docsrc/finfo/pages/lang_createtable.in?m=d5b0680939">2023-02-27 02:07:35</a> UTC </small></i></p>
+