我如何才能非常缓慢地加速此代码
create table #a(r_sayac varchar(120),i3 nvarchar(120),i4 varchar(120),i5 varchar(120),i6 varchar(120),i7 varchar(120),i8 varchar(120) )
insert #a
select sbss.r_sayac,sbss.i3,sbss.i4,sbss.i5,sbss.i6,sbss.i7,sbss.i8
from dbo.table1 sbss
update #a set #a.i3=mtib.i_anlami from #a,dbo.table2 mtib where #a.i3=mtib.i_rsayac
update #a set #a.i4=mtib.i_anlami from #a,dbo.table2 mtib where #a.i4=mtib.i_rsayac
update #a set #a.i5=mtib.i_anlami from #a,dbo.table2 mtib where #a.i5=mtib.i_rsayac
update #a set #a.i6=mtib.i_anlami from #a,dbo.table2 mtib where #a.i6=mtib.i_rsayac
update #a set #a.i7=mtib.i_anlami from #a,dbo.btable2 mtib where #a.i7=mtib.i_rsayac
update #a set #a.i8=mtib.i_anlami from #a,dbo.table2 mtib where #a.i8=mtib.i_rsayac