MySQL CASE更新多列 [英] MySQL CASE to update multiple columns

问题描述

我想使用一个case语句更新表中的多个列，但是我找不到如何执行此操作(甚至有可能).我提出了以下无效的参考查询:

I would like to update multiple columns in my table using a case statement, but I cannot find how to do this (is this even possible). I came up with the following invalid reference query:

UPDATE tablename SET
    CASE name
        WHEN 'name1' THEN col1=5,col2=''
        WHEN 'name2' THEN col1=3,col2='whatever'
        ELSE col1=0,col2=''
    END;

有什么方法可以通过有效的SQL达到预期的结果?

Is there any way of achieving the expected result with valid SQL?

推荐答案

UPDATE tablename
SET col1 = CASE WHEN name = 'name1' THEN 5 
                WHEN name = 'name2' THEN 3 
                ELSE 0 
           END
 , col2 = CASE WHEN name = 'name1' THEN '' 
               WHEN name = 'name2' THEN 'whatever' 
               ELSE '' 
          END
;

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