1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76
|
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>DROP TABLE</title>
<link rel="stylesheet" href="stylesheet.css" type="text/css">
<link rev="made" href="pgsql-docs@postgresql.org">
<meta name="generator" content="DocBook XSL Stylesheets V1.70.0">
<link rel="start" href="index.html" title="PostgreSQL 8.1.4 Documentation">
<link rel="up" href="sql-commands.html" title="SQL Commands">
<link rel="prev" href="sql-dropsequence.html" title="DROP SEQUENCE">
<link rel="next" href="sql-droptablespace.html" title="DROP TABLESPACE">
<link rel="copyright" href="ln-legalnotice.html" title="Legal Notice">
</head>
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="refentry" lang="en">
<a name="sql-droptable"></a><div class="titlepage"></div>
<div class="refnamediv">
<h2>Name</h2>
<p>DROP TABLE — remove a table</p>
</div>
<a name="id772673"></a><div class="refsynopsisdiv">
<h2>Synopsis</h2>
<pre class="synopsis">DROP TABLE <em class="replaceable"><code>name</code></em> [, ...] [ CASCADE | RESTRICT ]</pre>
</div>
<div class="refsect1" lang="en">
<a name="id772697"></a><h2>Description</h2>
<p> <code class="command">DROP TABLE</code> removes tables from the database.
Only its owner may destroy a table. To empty a table of rows,
without destroying the table, use <code class="command">DELETE</code>.
</p>
<p> <code class="command">DROP TABLE</code> always removes any indexes, rules,
triggers, and constraints that exist for the target table.
However, to drop a table that is referenced by a view or a foreign-key
constraint of another table, <code class="literal">CASCADE</code> must be
specified. (<code class="literal">CASCADE</code> will remove a dependent view entirely,
but in the foreign-key case it will only remove the foreign-key
constraint, not the other table entirely.)
</p>
</div>
<div class="refsect1" lang="en">
<a name="id772747"></a><h2>Parameters</h2>
<div class="variablelist"><dl>
<dt><span class="term"><em class="replaceable"><code>name</code></em></span></dt>
<dd><p> The name (optionally schema-qualified) of the table to drop.
</p></dd>
<dt><span class="term"><code class="literal">CASCADE</code></span></dt>
<dd><p> Automatically drop objects that depend on the table (such as
views).
</p></dd>
<dt><span class="term"><code class="literal">RESTRICT</code></span></dt>
<dd><p> Refuse to drop the table if any objects depend on it. This is
the default.
</p></dd>
</dl></div>
</div>
<div class="refsect1" lang="en">
<a name="id772790"></a><h2>Examples</h2>
<p> To destroy two tables, <code class="literal">films</code> and
<code class="literal">distributors</code>:
</p>
<pre class="programlisting">DROP TABLE films, distributors;</pre>
<p>
</p>
</div>
<div class="refsect1" lang="en">
<a name="id772817"></a><h2>Compatibility</h2>
<p> This command conforms to the SQL standard, except that the standard only
allows one table to be dropped per command.
</p>
</div>
<div class="refsect1" lang="en">
<a name="id772826"></a><h2>See Also</h2>
<span class="simplelist"><a href="sql-altertable.html">ALTER TABLE</a>, <a href="sql-createtable.html">CREATE TABLE</a></span>
</div>
</div></body>
</html>
|