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diff --git a/www/lang_droptable.html b/www/lang_droptable.html new file mode 100644 index 0000000..6cb452f --- /dev/null +++ b/www/lang_droptable.html @@ -0,0 +1,200 @@ +<!DOCTYPE html> +<html><head> +<meta name="viewport" content="width=device-width, initial-scale=1.0"> +<meta http-equiv="content-type" content="text/html; charset=UTF-8"> +<link href="sqlite.css" rel="stylesheet"> +<title>DROP TABLE</title> +<!-- path= --> +</head> +<body> +<div class=nosearch> +<a href="index.html"> +<img class="logo" src="images/sqlite370_banner.gif" alt="SQLite" border="0"> +</a> +<div><!-- IE hack to prevent disappearing logo --></div> +<div class="tagline desktoponly"> +Small. Fast. 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+antiRobotGo(); +}, 100) +antiRobotGo(); +} +antiRobotDefense(); +</script> +<div class=fancy> +<div class=nosearch> +<div class="fancy_title"> +DROP TABLE +</div> +</div> + + + + +<p><b><a href="syntax/drop-table-stmt.html">drop-table-stmt:</a></b> +<button id='xa474c09d' onclick='hideorshow("xa474c09d","xbbb7e16d")'>hide</button></p> + <div id='xbbb7e16d' class='imgcontainer'> + <div style="max-width:758px"><svg xmlns='http://www.w3.org/2000/svg' class="pikchr" viewBox="0 0 758.16 54"> +<circle cx="5" cy="17" r="3.6" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" /> +<polygon points="32,17 20,21 20,12" style="fill:rgb(0,0,0)"/> +<path d="M9,17L26,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" /> +<path d="M47,32L78,32A15 15 0 0 0 93 17A15 15 0 0 0 78 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="63" y="17" text-anchor="middle" fill="rgb(0,0,0)" dominant-baseline="central">DROP</text> +<polygon points="116,17 105,21 105,12" style="fill:rgb(0,0,0)"/> +<path d="M93,17L110,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" /> +<path d="M131,32L171,32A15 15 0 0 0 186 17A15 15 0 0 0 171 2L131,2A15 15 0 0 0 116 17A15 15 0 0 0 131 32Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" /> +<text x="151" y="17" text-anchor="middle" fill="rgb(0,0,0)" dominant-baseline="central">TABLE</text> +<polygon points="222,17 210,21 210,12" style="fill:rgb(0,0,0)"/> +<path d="M186,17L216,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" /> +<path d="M237,32A15 15 0 0 0 252 17A15 15 0 0 0 237 2A15 15 0 0 0 222 17A15 15 0 0 0 237 32Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" /> +<text x="237" y="17" text-anchor="middle" fill="rgb(0,0,0)" dominant-baseline="central">IF</text> +<polygon points="275,17 264,21 264,12" style="fill:rgb(0,0,0)"/> +<path d="M252,17L269,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" /> +<path d="M290,32L335,32A15 15 0 0 0 350 17A15 15 0 0 0 335 2L290,2A15 15 0 0 0 275 17A15 15 0 0 0 290 32Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" /> +<text x="313" y="17" text-anchor="middle" fill="rgb(0,0,0)" dominant-baseline="central">EXISTS</text> +<polygon points="404,17 392,21 392,12" style="fill:rgb(0,0,0)"/> +<path d="M350,17L398,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" /> +<path d="M419,32L515,32A15 15 0 0 0 531 17A15 15 0 0 0 515 2L419,2A15 15 0 0 0 404 17A15 15 0 0 0 419 32Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" /> +<text x="467" y="17" text-anchor="middle" fill="rgb(0,0,0)" dominant-baseline="central">schema-name</text> +<polygon points="554,17 542,21 542,12" style="fill:rgb(0,0,0)"/> +<path d="M531,17L548,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" /> +<path d="M569,32A15 15 0 0 0 584 17A15 15 0 0 0 569 2A15 15 0 0 0 554 17A15 15 0 0 0 569 32Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" /> +<text x="569" y="17" text-anchor="middle" font-weight="bold" fill="rgb(0,0,0)" dominant-baseline="central">.</text> +<polygon points="620,17 608,21 608,12" style="fill:rgb(0,0,0)"/> +<path d="M584,17L614,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" /> +<path d="M635,32L710,32A15 15 0 0 0 725 17A15 15 0 0 0 710 2L635,2A15 15 0 0 0 620 17A15 15 0 0 0 635 32Z" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" /> +<text x="673" y="17" text-anchor="middle" fill="rgb(0,0,0)" dominant-baseline="central">table-name</text> +<polygon points="748,17 737,21 737,12" style="fill:rgb(0,0,0)"/> +<path d="M725,17L743,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" /> +<circle cx="752" cy="17" r="3.6" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" /> +<polygon points="275,47 264,51 264,43" style="fill:rgb(0,0,0)"/> +<path d="M186,17 L 193,17 Q 201,17 201,32 L 201,32 Q 201,47 216,47 L 254,47 L 269,47" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" /> +<path d="M275,47 L 350,47 Q 365,47 365,32 L 365,32 Q 365,17 372,17 L 380,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" /> +<polygon points="467,47 456,51 456,43" style="fill:rgb(0,0,0)"/> +<path d="M372,17 L 379,17 Q 387,17 387,32 L 387,32 Q 387,47 402,47 L 447,47 L 462,47" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" /> +<path d="M467,47 L 584,47 Q 599,47 599,32 L 599,32 Q 599,17 606,17 L 614,17" style="fill:none;stroke-width:2.16;stroke:rgb(0,0,0);" /> +</svg> +</div> +</div> + + +<p>The DROP TABLE statement removes a table added with the +<a href="lang_createtable.html">CREATE TABLE</a> statement. The name specified is the +table name. The dropped table is completely removed from the database +schema and the disk file. The table can not be recovered. +All indices and triggers +associated with the table are also deleted.</p> + +<p>The optional IF EXISTS clause suppresses the error that would normally +result if the table does not exist.</p> + +<p>If <a href="foreignkeys.html">foreign key constraints</a> are enabled, a DROP TABLE command performs an +implicit <a href="lang_delete.html">DELETE FROM</a> command before removing the +table from the database schema. Any triggers attached to the table are +dropped from the database schema before the implicit DELETE FROM +is executed, so this cannot cause any triggers to fire. By contrast, an +implicit DELETE FROM does cause any configured +<a href="foreignkeys.html#fk_actions">foreign key actions</a> to take place. +If the implicit DELETE FROM executed +as part of a DROP TABLE command violates any immediate foreign key constraints, +an error is returned and the table is not dropped. If +the implicit DELETE FROM causes any +deferred foreign key constraints to be violated, and the violations still +exist when the transaction is committed, an error is returned at the time +of commit. +</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_droptable.in?m=0350dfc779">2022-01-08 05:02:57</a> UTC </small></i></p> + |