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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 12:17:33 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-04 12:17:33 +0000 |
| commit | 5e45211a64149b3c659b90ff2de6fa982a5a93ed (patch) | |
| tree | 739caf8c461053357daa9f162bef34516c7bf452 /doc/src/sgml/html/tutorial-populate.html | |
| parent | Initial commit. (diff) | |
| download | postgresql-15-5e45211a64149b3c659b90ff2de6fa982a5a93ed.tar.xz postgresql-15-5e45211a64149b3c659b90ff2de6fa982a5a93ed.zip | |
Adding upstream version 15.5.upstream/15.5
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'doc/src/sgml/html/tutorial-populate.html')
| -rw-r--r-- | doc/src/sgml/html/tutorial-populate.html | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/doc/src/sgml/html/tutorial-populate.html b/doc/src/sgml/html/tutorial-populate.html new file mode 100644 index 0000000..53b0123 --- /dev/null +++ b/doc/src/sgml/html/tutorial-populate.html @@ -0,0 +1,59 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>2.4. Populating a Table With Rows</title><link rel="stylesheet" type="text/css" href="stylesheet.css" /><link rev="made" href="pgsql-docs@lists.postgresql.org" /><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /><link rel="prev" href="tutorial-table.html" title="2.3. Creating a New Table" /><link rel="next" href="tutorial-select.html" title="2.5. Querying a Table" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">2.4. Populating a Table With Rows</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="tutorial-table.html" title="2.3. Creating a New Table">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="tutorial-sql.html" title="Chapter 2. The SQL Language">Up</a></td><th width="60%" align="center">Chapter 2. The <acronym class="acronym">SQL</acronym> Language</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 15.5 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="tutorial-select.html" title="2.5. Querying a Table">Next</a></td></tr></table><hr /></div><div class="sect1" id="TUTORIAL-POPULATE"><div class="titlepage"><div><div><h2 class="title" style="clear: both">2.4. Populating a Table With Rows</h2></div></div></div><a id="id-1.4.4.5.2" class="indexterm"></a><p> + The <code class="command">INSERT</code> statement is used to populate a table with + rows: + +</p><pre class="programlisting"> +INSERT INTO weather VALUES ('San Francisco', 46, 50, 0.25, '1994-11-27'); +</pre><p> + + Note that all data types use rather obvious input formats. + Constants that are not simple numeric values usually must be + surrounded by single quotes (<code class="literal">'</code>), as in the example. + The + <code class="type">date</code> type is actually quite flexible in what it + accepts, but for this tutorial we will stick to the unambiguous + format shown here. + </p><p> + The <code class="type">point</code> type requires a coordinate pair as input, + as shown here: +</p><pre class="programlisting"> +INSERT INTO cities VALUES ('San Francisco', '(-194.0, 53.0)'); +</pre><p> + </p><p> + The syntax used so far requires you to remember the order of the + columns. An alternative syntax allows you to list the columns + explicitly: +</p><pre class="programlisting"> +INSERT INTO weather (city, temp_lo, temp_hi, prcp, date) + VALUES ('San Francisco', 43, 57, 0.0, '1994-11-29'); +</pre><p> + You can list the columns in a different order if you wish or + even omit some columns, e.g., if the precipitation is unknown: +</p><pre class="programlisting"> +INSERT INTO weather (date, city, temp_hi, temp_lo) + VALUES ('1994-11-29', 'Hayward', 54, 37); +</pre><p> + Many developers consider explicitly listing the columns better + style than relying on the order implicitly. + </p><p> + Please enter all the commands shown above so you have some data to + work with in the following sections. + </p><p> + <a id="id-1.4.4.5.7.1" class="indexterm"></a> + + You could also have used <code class="command">COPY</code> to load large + amounts of data from flat-text files. This is usually faster + because the <code class="command">COPY</code> command is optimized for this + application while allowing less flexibility than + <code class="command">INSERT</code>. An example would be: + +</p><pre class="programlisting"> +COPY weather FROM '/home/user/weather.txt'; +</pre><p> + + where the file name for the source file must be available on the + machine running the backend process, not the client, since the backend process + reads the file directly. You can read more about the + <code class="command">COPY</code> command in <a class="xref" href="sql-copy.html" title="COPY"><span class="refentrytitle">COPY</span></a>. + </p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="tutorial-table.html" title="2.3. Creating a New Table">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="tutorial-sql.html" title="Chapter 2. The SQL Language">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="tutorial-select.html" title="2.5. Querying a Table">Next</a></td></tr><tr><td width="40%" align="left" valign="top">2.3. Creating a New Table </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 15.5 Documentation">Home</a></td><td width="40%" align="right" valign="top"> 2.5. Querying a Table</td></tr></table></div></body></html>
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