MYSQL UPDATE SET在同一列上但具有多个WHERE子句

Question

使用MYSQL我正在使用此查询:

UPDATE CustomerDetails_COPY
SET Category_ID = 10
WHERE Category_ID = 2

这很好,但我想要更多15+以上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
.....

我该如何添加？

编辑:

正如每个猎人的建议:

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

这样的事情对你有用:

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)

或者,正如Simon建议的那样,您可以这样做以避免两次输入值:

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/