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<?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>7.4. returning</title><link rel="stylesheet" type="text/css" href="/docbook.css" /><meta name="generator" content="DocBook XSL Stylesheets V1.79.1" /><link rel="home" href="index.html" title="Netkiller PostgreSQL 手札" /><link rel="up" href="sql.html" title="第 7 章 SQL" /><link rel="prev" href="sql.recursive.html" title="7.3. 递归查询" /><link rel="next" href="sql.function.html" title="7.5. Function" /></head><body><a xmlns="" href="//www.netkiller.cn/">Home</a> |
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<a xmlns="" href="//www.netkiller.cn/home/about.html">About</a><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">7.4. returning</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="sql.recursive.html">上一页</a> </td><th width="60%" align="center">第 7 章 SQL</th><td width="20%" align="right"> <a accesskey="n" href="sql.function.html">下一页</a></td></tr></table><hr /></div><table xmlns=""><tr><td><iframe src="//ghbtns.com/github-btn.html?user=netkiller&repo=netkiller.github.io&type=watch&count=true&size=large" height="30" width="170" frameborder="0" scrolling="0" style="width:170px; height: 30px;" allowTransparency="true"></iframe></td><td><iframe src="//ghbtns.com/github-btn.html?user=netkiller&repo=netkiller.github.io&type=fork&count=true&size=large" height="30" width="170" frameborder="0" scrolling="0" style="width:170px; height: 30px;" allowTransparency="true"></iframe></td><td><iframe src="//ghbtns.com/github-btn.html?user=netkiller&type=follow&count=true&size=large" height="30" width="240" frameborder="0" scrolling="0" style="width:240px; height: 30px;" allowTransparency="true"></iframe></td></tr></table><div class="section"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="returning"></a>7.4. returning</h2></div></div></div>
<div class="example"><a id="idp64"></a><p class="title"><strong>例 7.3. PostgreSQL insert returning</strong></p><div class="example-contents">
<pre class="screen">
test=# create table account(id serial,name varchar,pass varchar);
NOTICE: CREATE TABLE will create implicit sequence "account_id_seq" for serial column "account.id"
CREATE TABLE
test=# insert into account(name,pass) values('neo','chen') returning id;
id
----
1
(1 row)
INSERT 0 1
</pre>
<p>returning p1,p2...</p>
<pre class="screen">
test=# insert into account(name,pass) values('jam','123'),('john','456') returning id, name;
id | name
----+------
2 | jam
3 | john
(2 rows)
INSERT 0 2
</pre>
<p>returning *</p>
<pre class="screen">
test=# insert into account(name,pass) values('sam',md5('123')),('ivan',md5('456')),('lily',md5('789')) returning *;
id | name | pass
----+------+----------------------------------
4 | sam | 202cb962ac59075b964b07152d234b70
5 | ivan | 250cf8b51c773f3f8dc8b4be867a9a02
6 | lily | 68053af2923e00204c3ca7c6a3150cf7
(3 rows)
INSERT 0 3
</pre>
</div></div><br class="example-break" />
<div class="example"><a id="idp65"></a><p class="title"><strong>例 7.4. PostgreSQL update returning</strong></p><div class="example-contents">
<pre class="screen">
test=# update account set pass = md5(pass) where id=3 returning id,pass;
id | pass
----+----------------------------------
3 | 250cf8b51c773f3f8dc8b4be867a9a02
(1 row)
UPDATE 1
</pre>
<pre class="screen">
test=# update account set pass = md5(pass) where id < 3 returning *;
id | name | pass
----+------+----------------------------------
1 | neo | a1a8887793acfc199182a649e905daab
2 | jam | 202cb962ac59075b964b07152d234b70
(2 rows)
UPDATE 2
</pre>
</div></div><br class="example-break" />
<div class="example"><a id="idp66"></a><p class="title"><strong>例 7.5. PostgreSQL delete returning</strong></p><div class="example-contents">
<pre class="screen">
test=# delete from account where id=6 returning id,name;
id | name
----+------
6 | lily
(1 row)
DELETE 1
</pre>
<pre class="screen">
test=# delete from account where id<6 returning *;
id | name | pass
----+------+----------------------------------
4 | sam | 202cb962ac59075b964b07152d234b70
5 | ivan | 250cf8b51c773f3f8dc8b4be867a9a02
3 | john | 250cf8b51c773f3f8dc8b4be867a9a02
1 | neo | a1a8887793acfc199182a649e905daab
2 | jam | 202cb962ac59075b964b07152d234b70
(5 rows)
DELETE 5
</pre>
</div></div><br class="example-break" />
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