.请教一个面试中遇到的SQL语句的查询问题
表中有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，当B列大于C列时选择B列否则选择C列。
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select (case when a>b then a else b end ),
(case when b>c then b esle c end)
from table_name
- 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