SQL CASE可不可以查询多个字段
SQL CASE能否查询多个字段？
select price,(select count(*) from table1 where
CASE
WHEN Identify=152 THEN aa='sss'
ELSE bb='ssss'
END
)num from dbo.table2
当table1表中的Identify=152条件时，查询aa='sss'，否则查询bb='ssss'。求解？
------解决方案--------------------
select price,(select count(*) from table1 where
CASE
WHEN Identify=152 THEN aa='sss'
ELSE bb='ssss'
END
)num from dbo.table2
当table1表中的Identify=152条件时，查询aa='sss'，否则查询bb='ssss'。求解？
------解决方案--------------------
- SQL code
SELECT price ,
CASE WHEN EXISTS ( SELECT 1
FROM table1
WHERE Identify = 152 ) THEN ( SELECT
COUNT(*)
FROM
table1
WHERE
aa = 'sss'
)
ELSE ( SELECT COUNT(*)
FROM table1
WHERE bb = 'sss'
)
END
FROM table2