看看这条语句怎么写，在线等

[szc21]

表 AB 字段 id aa
1 aaaa
2 bbbb
3 cccc
其中AB表中有很多记录，我想随机取出5条，并把字段aa组合成一个以‘，’分隔的长字符串，更新到另一表中，不知道怎样写好

create proc xxxxxxx
as
begin
declare @bbb varchar(200)
--随机选出记录并组合成字符串传给变量@bbb 例如：aaaa,bbbb,cccc,(这部分怎么写？)
update ab2 set aa = @bbb where ....
end

[pt1314917]

declare @sql varchar(1000)
select @sql=isnull(@sql+',','')+aa from (select top 5 * from ab order by newid())a
update ab2 set aa=@sql where ......

[lass_name]

declare @str varchar(200)
select @str = isnull(@str+',','')+aa from (select top 5 * from AB) bb
print @str
这样就可以查出你要的数据了

[中国风]

	declare @s nvarchar(1000)
	select @s=isnull(@s+',','')+quotename(Name) from (select top 5 Name from 表名 order by newiD())t
	update 表名 set Name=@s where .......

[火星求索]

--环境
create table tb(id int identity(1,1),[name] char(10))
insert into tb select 'a'
insert into tb select 'b'
insert into tb select 'c'
insert into tb select 'd'
insert into tb select 'e'
insert into tb select 'f'
go
create table ttb(id int identity(1,1),[name] char(100))
select * from ttb
delete from ttb
go
--存储过程
create proc GetTop 
 as 
 begin 
  declare @Row int
  set @Row=0
  while @Row < 5
  begin 
  declare @sql nvarchar(200)
  set @sql=''
  select @sql=@sql+[name] from (select top 5 * from tb order by newid()) t
  insert ttb select name = @sql
  set @Row=@Row+1
  end
end

--删除环境
drop table ttb
go
drop table tb
go
drop proc GetTop

[dawugui]

create table tb(id varchar(10),username varchar(10))
insert into tb values('1', '123')
insert into tb values('2', '234')
insert into tb values('3', 'hell')
go

declare @a varchar(5000),@b varchar(5000)
select @a='',@b=''
select @a=@a+'，'+rtrim(id),@b=@b+'，'+username from tb
select 'id',stuff(@a,1,1,'') union select 'username',stuff(@b,1,1,'')


drop table tb

/*
-------- --------------
id 1，2，3
username 123，234，hell

（所影响的行数为 2 行）
*/

[szc21]

谢谢各位

[火星求索]

create proc GetTop 
 as 
 begin 
  declare @Row int
  set @Row=0
  while @Row < 5
  begin 
  declare @sql nvarchar(200)
  set @sql=''
  select @sql=@sql+[name] from (select top 5 * from tb order by newid()) t
  update ttb set id = @Row
  set @Row=@Row+1
  end
end

[chuifengde]

create proc xxxxxxx
as
begin
declare @bbb varchar(200)
select @bbb=isnull(@bbb+',','')+ aa from (select top 5 bb from ab order by newid()) bb
update ab2 set aa = @bbb where ....
end

[fcuandy]

declare @linkSTR varchar(200)
select top 5 @linkSTR=isnull(@linkSTR,'') + ',' + aa from ab order by newid()
update ab2 set aa=stuff(@linkSTR,1,1,'') where ...