--> 測試數據: #Job
if object_id('tempdb.dbo.#Job') is not null drop table #Job
create table #Job (JobID int,jobCorporation int,JobCount int,JobStart datetime,JobBack int)
insert into #Job
select 1,11,0,'2004-4-7',1 union all
select 2,11,0,'2005-4-4',1 union all
select 3,22,0,'2005-4-4',1 union all
select 4,22,0,'2005-4-4',1 union all
select 5,22,0,'2005-4-4',1

select * from #Job as t where not exists (select 1 from #Job where jobCorporation=t.jobCorporation and JobID<t.JobID)
/*
JobID?????? jobCorporation JobCount??? JobStart??????????????? JobBack
----------- -------------- ----------- ----------------------- -----------
1?????????? 11???????????? 0?????????? 2004-04-07 00:00:00.000 1
3?????????? 22???????????? 0?????????? 2005-04-04 00:00:00.000 1
*/

?

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