TSQL JOIN澄清

Question

假设我有两个表

declare @emp table 
(
    EmpID int, 
    EmpName varchar(10) 

) 

declare @Remu table 
(
    EmpID int, 
    Sal Decimal(10,2), 
    PaidYear varchar(10) 
) 

我要上PaidYear分组（含并列）的顶薪

预期输出

EmpID EmpName PaidYear Sal 
1  Jon  2001  2000 
2  Smith 2001  2000 

3  Nash 2003  4000  
4  Hoge 2005  5000 
5  Peter 2005  5000 

我有一个问题，当使用加入

select e.EmpID,e.EmpName,r.Sal,r.PaidYear from @emp e 
inner join 
(select max(Sal) as Sal,PaidYear from @Remu group by PaidYear)r 
on e.EmpID=??? 

当我在

select max(Sal) as Sal,PaidYear from @Remu group by PaidYear 

选择的EmpID我必须组由PaidYear和的EmpID，这将不会得到预期的结果作为我的预期。

如何解决this.I想这应该是与SQL Server 2000

Answer 1

select e.EmpID,e.EmpName,r.Sal,r.PaidYear 
from @emp e inner join @Remu r on e.EmpId = r.EmpId 
where r.sal in (select max(sal) from @remu group by paidyear) 

Answer 2

每年需要确定特定于该年单一最大薪水兼容的查询。

select e.EmpID 
    , e.EmpName 
    , r.Sal 
    , r.PaidYear 
from @emp as e 
inner join @Remu as r 
on e.EmpId = r.EmpId 
where r.sal = (select max(sal) 
       from @remu 
       where paidyear = r.PaidYear ' makes it year specific 
      ) 

数据来检验：

declare @emp table 
( 
    EmpID int, 
    EmpName varchar(10) 

) 

declare @Remu table 
( 
    EmpID int, 
    Sal Decimal(10,2), 
    PaidYear varchar(10) 
) 

insert into @emp (EmpID, EmpName) 
values(1, 'Jon') 
insert into @emp (EmpID, EmpName) 
values(2, 'Smith') 
insert into @emp (EmpID, EmpName) 
values(3, 'Nash') 
insert into @emp (EmpID, EmpName) 
values(4, 'Hoge') 
insert into @emp (EmpID, EmpName) 
values(5, 'Peter') 

Insert into @Remu (EmpID, Sal, PaidYear) 
values(1, 2000, '2001') 

Insert into @Remu (EmpID, Sal, PaidYear) 
values(2, 4999, '2001') 

Insert into @Remu (EmpID, Sal, PaidYear) 
values(2, 8000, '2003') 

Insert into @Remu (EmpID, Sal, PaidYear) 
values(3,4000, '2003')  

Insert into @Remu (EmpID, Sal, PaidYear) 
values(4, 5000, '2005')  

Insert into @Remu (EmpID, Sal, PaidYear) 
values(5, 4999, '2005') 

结果：

EmpID EmpName Sal PaidYear 
4   Hoge 5000.00 2005 
2   Smith 8000.00 2003 
2   Smith 4999.00 2001