显示具有条件的列的每个记录集的单行

Question

我在SQL Server中有一个查询。

有一个临时表#final，如下所示

我想只获取具有Maximum EXPECTEDENDDATE的每个项目的单行。

Answer 1

尝试下面的一个： -

Select  f1.*
From    #Final As f1 With (Nolock)
        Join
        (
            Select   Max(EXPECTEDENDDATE) As EXPECTEDENDDATE
                    ,EmployeeCode
                    ,ProjectCode
            From    #Final As t With (Nolock)
            Group By t.EmployeeCode
                     ,t.ProjectCode
        ) As f On f1.EmployeeCode = f.EmployeeCode
                And f1.ProjectCode = f.ProjectCode
                ANd f1.EXPECTEDENDDATE = f.EXPECTEDENDDATE

<强>更新

Declare @final Table
(
     EmployeeCode           Int
    ,ProjectName            Varchar(500)
    ,ExpectedStartDate      Date
    ,ExpectedEndDate        Date
    ,DaysAllocated          Int
)

Declare @SameStartProjects Table
(
     EmployeeCode           Int
    ,ProjectName            Varchar(500)
    ,RowNum                 BigInt
)

Insert Into @final(EmployeeCode,ProjectName,ExpectedStartDate,ExpectedEndDate,DaysAllocated) Values
 (1149,'INT-Vibrant Web','2015-04-22','2015-05-21',14)
,(1149,'INT-Vibrant Web','2015-05-22','2015-05-31',6)
,(1149,'Praetorian Track Off','2015-03-19','2015-05-22',15)
,(1149,'Praetorian Track Off','2015-03-19','2015-06-11',20)
,(1149,'RPost Phase ||','2015-05-01','2015-05-31',20)

Insert Into @SameStartProjects(EmployeeCode,ProjectName,RowNum)
Select   p.EmployeeCode
        ,p.ProjectName
        ,Row_Number() Over(Partition By p.ExpectedStartDate Order By p.ExpectedStartDate) As RowNum
From    @final As p


Select  s.*
From    @final As s
        Join
        (
            Select   f.EmployeeCode
                    ,f.ProjectName
                    ,f.ExpectedStartDate
                    ,Max(f.ExpectedEndDate) As ExpectedEndDate
                    ,Max(sp.RowNum) As RowNum
            From    @final As f
                    Join @SameStartProjects As sp On f.EmployeeCode = sp.EmployeeCode
                            And f.ProjectName = sp.ProjectName
            Group By f.EmployeeCode
                    ,f.ProjectName
                    ,f.ExpectedStartDate
        ) As f On s.EmployeeCode = f.EmployeeCode
            And s.ProjectName = f.ProjectName
            And s.ExpectedEndDate = f.ExpectedEndDate

以上，@ final是你的#final表，我没有采用例如

的所有属性

<强>输出： -