在单个MySQL查询中更新多行 [英] Update multiple rows in a single MySQL query

问题描述

我正在尝试运行此

UPDATE test 
SET col2=1 WHERE col1='test1', 
SET col2=3 WHERE col1='test2';

我得到的错误:

[Err] 1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '

我的桌子:

CREATE TABLE `test` (
    `col1` varchar(30) NOT NULL,
    `col2` int(5) DEFAULT NULL,
    PRIMARY KEY (`col1`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

第一行末尾有关于,的内容.当我将其更改为;时，它无法识别col2.如何在一个查询中做到这一点?

It’s something about , at the end of the first row. When I changed it to ;, it didn’t recognize col2. How can I do this in one query?

推荐答案

这是最清晰的方法

UPDATE test
SET col2 = CASE col1
WHEN 'test1' THEN 1
WHEN 'test2' THEN 3
WHEN 'test3' THEN 5
END,
colx = CASE col1
WHEN 'test1' THEN 'xx'
WHEN 'test2' THEN 'yy'
WHEN 'test3' THEN 'zz'
END
WHERE col1 IN ('test1','test2','test3')

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