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sql语句有关问题?请帮忙

热度:8700   发布时间:2013-02-25 00:00:00.0
sql语句问题?!请帮忙!
select   *   from   dbo_Fc_Products   where   TypeID   in   (select   min(TypeID)   from   dbo_Fc_Products)   and   STypeID   =   5   order   by   PID   desc
看看这么写可以么



------解决方案--------------------------------------------------------
没什么不可以吧
------解决方案--------------------------------------------------------
整理一下:
select *
from dbo_Fc_Products
where TypeID in (select min(TypeID) from dbo_Fc_Products)
and STypeID = 5
order by PID desc


------------------------

select min(TypeID) from dbo_Fc_Products
可以用 group by 约束。

------解决方案--------------------------------------------------------
完全可以~~
------解决方案--------------------------------------------------------
SELECT * FROM [dbo_Fc_Products] WHERE TypeID = (SELECT TOP 1 TypeID FROM [dbo_Fc_Products ] ORDER BY TypeID ASC) and STypeID = 5 order by PID desc

这样写效率好像高一点,如果只取一个值的,最好不要用 IN

------解决方案--------------------------------------------------------
declare @TypeID int;
SELECT @TypeID= min(TypeID) from dbo_Fc_Products;
select * from dbo_Fc_Products where TypeID =@TypeID and STypeID = 5 order by PID desc;
这样也可以的,哈哈。
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