SQL Update多表联合更新的方法
<p>有些时候我们需要同时更新多个表中的数据那么就需要用到下面方法了：</p>
<p>
(1) sqlite 多表更新方法</p>
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</p>
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<span><u>复制代码</u></span> 代码如下:</div>
<div class="codebody" id="code68929">
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//----------------------------------<br>
update t1 set col1=t2.col1<br>
from table1 t1<br>
inner join table2 t2 on t1.col2=t2.col2</div>
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</p>
<p>
这是一个非常简单的批量更新语句 在SqlServer中支持此语法 sqlite中却不支持</p>
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sqlite中可转换为 如下语法</p>
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</p>
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<span><u>复制代码</u></span> 代码如下:</div>
<div class="codebody" id="code24591">
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update table1 set col1=(select col1 from table2 where col2=table1.col2)</p>
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</p>
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update ta_jbnt_tzhd_pht_Area_xiang set t1=(select sys_xzqhdm.name from sys_xzqhdm<br>
where t2=sys_xzqhdm.code)</p>
</div>
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</p>
<p>
(2) SQL Server 多表更新方法</p>
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</p>
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<span><u>复制代码</u></span> 代码如下:</div>
<div class="codebody" id="code2565">
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//----------------------------------<br>
SQL Server语法:UPDATE { table_name WITH ( < table_hint_limited > [ ...n ] ) |<br>
view_name | rowset_function_limited } SET { column_name = { expression | DEFAULT<br>
| NULL } | @variable = expression | @variable = column = expression } [ ,...n ]<br>
{ { [ FROM { < table_source > } [ ,...n ] ] [ WHERE < search_condition > ] } | [<br>
WHERE CURRENT OF { { [ GLOBAL ] cursor_name } | cursor_variable_name } ] } [<br>
OPTION ( < query_hint > [ ,...n ] ) ]</div>
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</p>
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SQL Server示例:</p>
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</p>
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<span><u>复制代码</u></span> 代码如下:</div>
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update a set a.gqdltks=b.gqdltks,a.bztks=b.bztks from<br>
landleveldata a,gdqlpj b where a.GEO_Code=b.lxqdm</div>
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</p>
<p>
access数据库多表更新方法</p>
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</p>
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<span><u>复制代码</u></span> 代码如下:</div>
<div class="codebody" id="code23523">
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x = "update " + DLTB + " a inner join tbarea2 b on a.objectid=b.FID set a." + fd_dltb_xzdwmj + "=b.area_xzdw, a." + fd_dltb_lxdwmj + "=b.area_lxdw";<br>
SQLList.Add(x);</div>
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</p>
<p>
(3) Oracle 多表更新方法</p>
<p>
Oracle语法:</p>
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<span><u>复制代码</u></span> 代码如下:</div>
<div class="codebody" id="code5769">
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UPDATE updatedtable SET (col_name1[,col_name2...])= (SELECT<br>
col_name1,[,col_name2...] FROM srctable )</div>
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</p>
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Oracel 示例:</p>
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</p>
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<span><u>复制代码</u></span> 代码如下:</div>
<div class="codebody" id="code32473">
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update landleveldata a set (a.gqdltks, a.bztks)= (select b.gqdltks,<br>
b.bztks from gdqlpj b where a.GEO_Code=b.lxqdm)</div>
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</p>
<p>
(4) MySQL 多表更新方法</p>
<p>
MySQL语法:</p>
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</p>
<div class="codetitle">
<span><u>复制代码</u></span> 代码如下:</div>
<div class="codebody" id="code52363">
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UPDATE table_references SET col_name1=expr1 [, col_name2=expr2 ...]<br>
</div>
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</p>
<p>
MySQL 示例:</p>
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</p>
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<span><u>复制代码</u></span> 代码如下:</div>
<div class="codebody" id="code19251">
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update landleveldata a, gdqlpj b set a.gqdltks= b.gqdltks, a.bztks=<br>
b.bztks where a.GEO_Code=b.lxqdm</div>
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