求一简单的问题!!
比如表A
col col2
54 a
57 b
59 c
60 d
其中 col 为主键 不重复
我要想select 这样结果 ,不要该变表的结构
newcol col col2
0 54 a
1 57 b
2 59 c
3 60 d
请问该怎么做了?
0
------解决方案--------------------drop table A
go
create table A(col int,col2 varchar(10))
insert into A
select 54, 'a '
union all select 57, 'b '
union all select 59, 'c '
union all select 60, 'd '
select newcol=(select count(*) from A aa where aa.col <A.col),* from A order by col
/*
newcol col col2
----------- ----------- ----------
0 54 a
1 57 b
2 59 c
3 60 d
(所影响的行数为 4 行)
*/
------解决方案--------------------select identity(int,1,1) as id, [user_name] into #tt from [User]
select id - 1 as id, [user_name] from #tt
drop table #tt