Sql server 根据表中的日期查找最近的记录
不知道如何在不特定于我的数据的情况下将其放在表中-我想根据表中的日期查找每个人的最新值 付款历史记录表Sql server 根据表中的日期查找最近的记录,sql-server,sql-server-2008,Sql Server,Sql Server 2008,不知道如何在不特定于我的数据的情况下将其放在表中-我想根据表中的日期查找每个人的最新值 付款历史记录表 PayHistoryID, EmployeeID, Date, PayRate 1, 1, '2017-01-01', 20000 2, 2, '2017-01-01', 21000 3, 3, '2017-01-01', 22000 4,
PayHistoryID, EmployeeID, Date, PayRate
1, 1, '2017-01-01', 20000
2, 2, '2017-01-01', 21000
3, 3, '2017-01-01', 22000
4, 3, '2017-05-01', 24000
5, 4, '2017-01-01', 20000
6, 4, '2017-06-01', 24000
员工表
EmployeeID, EmployeeName
1, Bob
2, Frank
3, Jess
4, Alex
我想带回来
EmployeeID, EmployeeName
1, 20000
2, 21000
3, 24000
4, 24000
要走的路是:
select
EmployeeID
,PayRate
from
(
select
rownum = row_number() over(partition by EmployeeID order by ph.[Date] desc)
,e.EmployeeID
,PayRate
from EmployeeTable e
inner join PayHistoryTable ph on e.EmployeeID = ph.EmployeeID
) x
where rownum = 1
要走的路是:
select
EmployeeID
,PayRate
from
(
select
rownum = row_number() over(partition by EmployeeID order by ph.[Date] desc)
,e.EmployeeID
,PayRate
from EmployeeTable e
inner join PayHistoryTable ph on e.EmployeeID = ph.EmployeeID
) x
where rownum = 1
您可以使用行号列出您的行,并仅选择前几行。 这里是一个查询表的示例,希望对您有所帮助
Select EmployeeID,PayRate FROM (
Select ROW_NUMBER() OVER(Partition By e.EmployeeID Order By [DATE] DESC) AS RN,e.EmployeeID,PayRate FROM @employee e
INNER JOIN @payHistory p on p.EmployeeID = e.EmployeeID
) as P
Where RN = 1
您可以使用行号列出您的行,并仅选择前几行。 这里是一个查询表的示例,希望对您有所帮助
Select EmployeeID,PayRate FROM (
Select ROW_NUMBER() OVER(Partition By e.EmployeeID Order By [DATE] DESC) AS RN,e.EmployeeID,PayRate FROM @employee e
INNER JOIN @payHistory p on p.EmployeeID = e.EmployeeID
) as P
Where RN = 1
使用第一个_值:
create table #PayHistory (PayHistoryID int, EmployeeID int, [Date] date, PayRate int)
insert into #PayHistory values(1, 1, '2017-01-01', 20000)
insert into #PayHistory values(2, 2, '2017-01-01', 21000)
insert into #PayHistory values(3, 3, '2017-01-01', 22000)
insert into #PayHistory values(4, 3, '2017-05-01', 24000)
insert into #PayHistory values(5, 4, '2017-01-01', 20000)
insert into #PayHistory values(6, 4, '2017-06-01', 24000)
select distinct EmployeeID, FIRST_VALUE(PayRate) OVER (Partition by EmployeeID order by [date] desc) from #PayHistory
2012年之前版本的等效版本:
select distinct ph.EmployeeID
, (Select top 1 Payrate from #PayHistory where EmployeeID = ph.EmployeeID ORDER BY [DATE] desc) as [PayRate]
from #PayHistory ph
使用第一个_值:
create table #PayHistory (PayHistoryID int, EmployeeID int, [Date] date, PayRate int)
insert into #PayHistory values(1, 1, '2017-01-01', 20000)
insert into #PayHistory values(2, 2, '2017-01-01', 21000)
insert into #PayHistory values(3, 3, '2017-01-01', 22000)
insert into #PayHistory values(4, 3, '2017-05-01', 24000)
insert into #PayHistory values(5, 4, '2017-01-01', 20000)
insert into #PayHistory values(6, 4, '2017-06-01', 24000)
select distinct EmployeeID, FIRST_VALUE(PayRate) OVER (Partition by EmployeeID order by [date] desc) from #PayHistory
2012年之前版本的等效版本:
select distinct ph.EmployeeID
, (Select top 1 Payrate from #PayHistory where EmployeeID = ph.EmployeeID ORDER BY [DATE] desc) as [PayRate]
from #PayHistory ph
您应该使用外部应用程序:
SELECT *
FROM Employee E
OUTER APPLY (SELECT TOP 1 PayRate FROM PayHistory PH WHERE PH.EmployeeID =
E.EmployeeID ORDER BY [date] DESC) T
您应该使用外部应用程序:
SELECT *
FROM Employee E
OUTER APPLY (SELECT TOP 1 PayRate FROM PayHistory PH WHERE PH.EmployeeID =
E.EmployeeID ORDER BY [date] DESC) T
问题被标记为SQL Server 2008,但我喜欢这个方法。我甚至不知道FIRST_值,但我喜欢它。让我们缩短我所有的程序!:不幸的是,PDidn没有注意到2008标签。我喜欢@Mikado68的早期版本的解决方案。如果我能够升级我们的SQL server,那就太好了!问题被标记为SQL Server 2008,但我喜欢这个方法。我甚至不知道FIRST_值,但我喜欢它。让我们缩短我所有的程序!:不幸的是,PDidn没有注意到2008标签。我喜欢@Mikado68的早期版本的解决方案。如果我能够升级我们的SQL server,那就太好了!如果员工被减薪,这不起作用,工资率会更低,但日期越晚,你是对的,我以为我们需要一秒钟的最高工资率,我编辑了我的答案。如果员工被减薪,工资率会更低,但日期越晚,你是对的,我以为声明是我们需要一秒钟内最高的工资率,我编辑了我的答案。