sql 语句，查询总数解决方案
日期：2014-05-18 浏览次数：20421 次
sql 语句，查询总数
一张ShopProduct表中有四个字段：ID，CreateTImes，shopID 和 leftAmount
我要查询 Sum（leftAmount）不超过 8的 shopID 和Sum（LeftAmount）
我的语句是：select * from (select SUM(sp.LeftAmount) as Amount ,sp.ShopID as shopID from ShopProduct as sp where sp.ProductID=238 group by sp.ShopID) as shopP where shopP.Amount<=8
请问还有没有更优化的语句。
------解决方案--------------------
一张ShopProduct表中有四个字段：ID，CreateTImes，shopID 和 leftAmount
我要查询 Sum（leftAmount）不超过 8的 shopID 和Sum（LeftAmount）
我的语句是：select * from (select SUM(sp.LeftAmount) as Amount ,sp.ShopID as shopID from ShopProduct as sp where sp.ProductID=238 group by sp.ShopID) as shopP where shopP.Amount<=8
请问还有没有更优化的语句。
------解决方案--------------------
- SQL code
select SUM(sp.LeftAmount) as Amount ,sp.ShopID as shopID from ShopProduct as sp where sp.ProductID=238 group by sp.ShopID having SUM(sp.LeftAmount)<=8
------解决方案--------------------
select SUM(sp.LeftAmount) as Amount ,sp.ShopID as shopID from ShopProduct as sp where sp.ProductID=238 group by sp.ShopID having SUM(sp.LeftAmount) < 8
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