在mysql中的单个查询中更新多个表
问题描述：
我有三个查询，我想有一个查询.这些是我的查询:
I have three query and I would like to have a single one. These is my query:
UPDATE tab1 SET a='' WHERE id=3;
UPDATE tab2 SET b='' WHERE id=9;
UPDATE tab3 SET c='' WHERE id=5;
答
您可以尝试以下代码:
UPDATE tab1, tab2, tab3
SET tab1.a = '', tab2.b = '',tab3.c = ''
WHERE tab1.id = 3 AND tab2.id = 9 AND tab3.id = 5;
更新:
如OP所述，该代码不适用于 Mysql 5.5 ，下面添加了代码
As per mentioned by OP, the code not working for Mysql 5.5, below code added
UPDATE tab1 a
INNER JOIN tab2 b ON (a.id = b.id)
INNER JOIN tab3 c ON (a.id = c.id)
SET tab1.a = '', tab2.b = '', tab3.c = ''
WHERE a.id = 3 AND tab2.id = 9 AND tab3.id = 5;