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A±íÖÐÓÐ3¸ö×ֶΣ¬·Ö±ðÊÇa1(varchar)£¬a2(int)£¬a3(char(3))
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  F 21 WWW
  W 15 HHHH
  X 16 CCC
  B±íÓ¦¸ÃÊÇ
  b1 b2
  F21WWW 1
  W15HHH 2
  X16CCC 3

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SQL code:
insert into B(b1,b2)
select a1+rtrim(a2)+a3 , row_number() over (order by getdate())
from A


SQL code:
select a1+ a2 +a3 as b1, identity(int,1,1) as b2 into #b
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insert into b select * form #b



SQL code:

--> ²âÊÔÊý¾Ý£º[TA]
if object_id('[TA]') is not null drop table [TA]
create table [TA]([a1] varchar(1),[a2] int,[a3] varchar(4))
insert [TA]
select 'F',21,'WWW' union all
select 'W',15,'HHHH' union all
select 'X',16,'CCC'

select b1=a1+rtrim(a2)+a3,b2=Row_Number() over(order by a1) into TB
from [TA]

select * from T


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