同一列但具有多个WHERE子句的MYSQL UPDATE SET

Question

对于MYSQL，我正在使用以下查询：

UPDATE CustomerDetails_COPY
SET Category_ID = 10
WHERE Category_ID = 2

没关系，但我想向其投放15个以上的广告SET/WHERE：

UPDATE CustomerDetails_COPY
SET Category_ID = 9  WHERE Category_ID = 3
SET Category_ID = 12 WHERE Category_ID = 4
SET Category_ID = 11 WHERE Category_ID = 5
.....

我要如何添加呢？

编辑：

根据猎人的建议：

UPDATE CustomerDetails_COPY
    SET Category_ID = CASE Category_ID
        WHEN 2 THEN 10 
        WHEN 3 THEN 9
        WHEN 4 THEN 12
        WHEN 5 THEN 11
    END
WHERE Category_ID IN (2,3,4,5)

这很棒！谢谢

Answer 1

这样的事情应该为您工作：

UPDATE CustomerDetails_COPY
    SET Category_ID = CASE Category_ID
        WHEN 2 THEN 10 
        WHEN 3 THEN 9
        WHEN 4 THEN 12
        WHEN 5 THEN 11
    END
WHERE Category_ID IN (2,3,4,5)

另外，如Simon所建议的，您可以这样做来避免输入两次值：

UPDATE CustomerDetails_COPY
    SET Category_ID = CASE Category_ID
        WHEN 2 THEN 10 
        WHEN 3 THEN 9
        WHEN 4 THEN 12
        WHEN 5 THEN 11
        ELSE Category_ID
    END

资料来源：http :
//www.karlrixon.co.uk/writing/update-multiple-rows-with-different-values-and-
a-single-sql-query/