求SQL 查询条件

[reallylovesky]

table1
a b(varchar) c(varchar) d(varchar) e(varchar)
-- 200701
-- 200701
b,c,d,e 都是日期格式格式為：200701
我想查出table中数据
查询条件是 20070101--20070131
条件是 b 不为空时 查处符合输入条件的数据
如果b 为空时 查处c
如果c 为空 查询d

谢谢大家！

[正宗老冉]

[Quote=引用 1 楼 happyflystone 的回复:]
SQL codeselect *
from table1
where COALESCE(b,c,d,e) between '20070101' and '20070131'
[/Quote]

很强大！

[-狙击手-]

select *
from table1
where COALESCE(b,c,d,e) between '20070101' and '20070131' 

[reallylovesky]

好！谢谢

[wlinglong]

declare @tab table (a varchar(10),
b varchar(10),
c varchar(10),
d varchar(10))


Insert into @tab
Select '1','200701','200701','200701'
union
select '2','','','200701'
Select * From @tab
Where b between left('20070101',6) and left('20070131',6)

union all

Select * From @tab
Where c between left('20070101',6) and left('20070131',6) and b = ''

union all


Select * From @tab
Where d between left('20070101',6) and left('20070131',6) and c = '' and b = ''

[mabuchi]

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