SQL SUM（）按另一列的值

Question

我在MS SQL Server中創建通用鍵/值數據存儲。 我有一個UserDecimalData表定義如下

create table [UserDecimalData] (
    [UserID] nvarchar(64) not null,
    [ValueKey] uniqueidentifier not null,
    [Value] decimal null
);
alter table [UserDecimalData]
    add constraint PK_UserDecimalData primary key clustered ([UserID], [Date], [ValueKey]);

舉例來說，以下是一些數據，該數據使用以0001結尾的GUID表示游戲中某人的得分，而使用以0002結尾的GUID表示用戶所在的團隊。

UserID  ValueKey                                Value
Dave    00000000-0000-0000-0000-000000000001    35
Dave    00000000-0000-0000-0000-000000000002    1
Phil    00000000-0000-0000-0000-000000000001    35
Phil    00000000-0000-0000-0000-000000000002    1
Pete    00000000-0000-0000-0000-000000000001    35
Pete    00000000-0000-0000-0000-000000000002    2

我可以通過搜索個人用戶ID +以0001結尾的ValueKey來輕松找到個人的分數。我還可以通過搜索其用戶ID + ValueKey以0002結尾的行的值來查找個人所在的團隊。

我的問題是，如何獲得球隊得分列表？ 在這種情況下，團隊1將擁有70，而團隊2將擁有35。

Answer 1

這是一種方法：

select sum(udd.value)
from UserDecimalData udd
where udd.ValueKey like '%1' and
      exists (select 1
              from UserDecimalData udd2
              where udd2.ValueKey like '%2' and
                    udd2.UserId = udd.UserId
             );

Answer 2

select v1.Value as Team, sum(v2.value) as TeamScore 
from userdecimaldata v1
join userdecimaldata v2 on v2.UserId = v1.UserId and v2.[Date] = v1.[Date]
where v1.ValueKey = @clankey and v2.ValueKey = @scoreKey
group by v1.Value

輸出值

 Team   TeamSccore
    1   70
    2   35

Answer 3

--first way
with commands as (
    select UserID as UserID, Value as command
    from UserDecimalData
    where ValueKey like '%2'
)
select c.command, sum(Value)
from UserDecimalData u
    left join commands c on u.UserID = c.UserID
where ValueKey like '%1'
group by command
GO

--second way
select c.command, sum(Value)
from UserDecimalData u
    left join (
            select UserID as UserID, Value as command
            from UserDecimalData
            where ValueKey like '%2'
        ) c on u.UserID = c.UserID
where ValueKey like '%1'
group by command
GO

--results
--1 70
--2 35

Answer 4

select u1.Value, sum(u0.Value)
from UserDecimalData u1
    left join UserDecimalData u0 on u0.UserID = u1.UserID and u0.ValueKey like '%1' 
where u1.ValueKey like '%2'
group by u1.Value 

GO