用一条sql语句修改三个地方

答案:6 悬赏:70

解决时间 2021-04-27 12:15

提问者网友：喵星人荷西
2021-04-27 02:55

有表Demo 字段有id和name，name值有九条，怎样用一条语把name属性中的前三条值改成A,中间三条改成B，最后三条改成C

最佳答案

二级知识专家网友：我颠覆世界
2021-04-27 04:02

update all Demo when case id<4 then set name='A ' when case id<7 then set name='B' when case id<10 then set name='C'

全部回答

1楼网友：初心未变
2021-04-27 07:59

楼上的不对吧！你们就确认前9条的id就是1-9，太主观了。

2楼网友：承载所有颓废
2021-04-27 07:37

update Demo set id=case when id<4 then 'A' when id>3 and id<7 then 'B' else 'C' end

3楼网友：茫然不知崩溃
2021-04-27 07:08

UPDATE DEMO SET NAME='A' WHERe ID<=3 UPDATE DEMO SET NAME='B' WHERe ID<=6 AND ID>3 UPDATE DEMO SET NAME='C' WHERe ID<=9 AND ID>6

4楼网友：废途浑身病态
2021-04-27 05:56

update tablea set tablea.name=b.name from tablea a, ( select id, 'a' as name from tablea where id between 1 and 3 union select id, 'b' as name from tablea where id between 50 and 60 union select id, 'c' as name from tablea where id between 80 and 85

) b where a.id=b.id

5楼网友：哭不代表软弱
2021-04-27 04:39

--sql server update demo set [name]='C' SET ROWCOUNT 6 update demo set [name]='B' SET ROWCOUNT 3 update demo set [name]='A' SET ROWCOUNT 0

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