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select row_number() over(order by(select 1))as rowNumber,* into #TempTable from
(
select * from ta
union All
select * from tb
)T
select INENTITY(INT,1,1) as rowNumber,* into #TempTable from
(
select * FROM A
union All
select * FROM B
)T
select row_number() over(order by ID)as rowNumber,* into #TempTable from
(
select * from ta
union All
select * from tb
)T
over (partition by 要分组的字段 order by ID )