Sql查询时加自动增长列

1:没有主键的情形：
   Select identity(int,1,1) as iid,* into #tmp from TableName
   Select * from #tmp
   Drop table #tmp
2:有主键的情形：
   Select (Select sum(1) from TableName where KeyField <= a.KeyField) as iid,* from TableName a order by iid