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SQL面试题:有A B C三列,用SQL语句实现:当A列大于B列时选择A列否则选择B列
SQL面试题:有A B C三列,用SQL语句实现:当A列大于B列时选择A列否则选择B列
时间:2021-07-01 10:21:17
帮助过:4人阅读
- drop table table1
- create table table1(
- a int,
- b int,
- c int
- )
- insert into table1 values(22,24,23)
-
- select * from table1
-
- select (case when a>b then a else b end),(case when b>c then b else c end)
- from table1
-
- select (case when a>b then a
- when a>c then a
- when b>c then b else c
- end)
- from table1
SQL面试题:有A B C三列,用SQL语句实现:当A列大于B列时选择A列否则选择B列
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