问一条SQL语句.多表,该如何处理
日期：2014-05-16 浏览次数：20657 次
问一条SQL语句..多表
需求就是第一句语句，该怎么写呢？
分不多，见谅了啊
------解决方案--------------------
------解决方案--------------------
SELECT [UserID],[Name],[RegisterDate],('下面3句的和') FROM [Acinfo]
select sum([Score]) as sum1 from [UserInfo] where [UserID] = 2
select sum([Price]*[Count]) as sum2 FROM [Property] where [UserID] = 2
select sum(PPrice*PCount) as sum3 FROM [Present] where [UserID] = 2
需求就是第一句语句，该怎么写呢？
分不多，见谅了啊
------解决方案--------------------
SELECT [UserID],[Name],[RegisterDate]
,((select sum([Score]) as sum1 from [UserInfo] where [UserID]=t.[UserID])
+(select sum([Price]*[Count]) as sum2 FROM [Property] where [UserID]=t.[UserID])
+(select sum(PPrice*PCount) as sum3 FROM [Present] where [UserID] =t.[UserID]))
AS [3句的和]
FROM [Acinfo] t (NOLOCK)
WHERE t.[UserID]=2
------解决方案--------------------
SELECT [UserID],[Name],[RegisterDate],sum([Score]) as sum1
, sum([Price]*[Count]) as sum2
,sum(PPrice*PCount) as sum3
FROM [Acinfo] a
JOIN [UserInfo] u ON a.UserID = u.UserID
JOIN Property p ON a.UserID = p.UserID
JOIN [Present] t ON a.UserID = t.UserID
GROUP BY [UserID],[Name],[RegisterDate]
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