方法一：
create table #Tmp (nu int, val varchar(100))
insert into #Tmp values(1, \'a\')
insert into #Tmp values(2, \'b\')
insert into #Tmp values(2, \'c\')
insert into #Tmp values(3, \'d\')
insert into #Tmp values(3, \'e\')
insert into #Tmp values(3, \'f\')
select * from #Tmp
;with Orign as
(
select ROW_NUMBER() over(partition by nu order by nu) as rn, nu, val from #Tmp
),
recur as
(
select * from Orign where rn = 1
union all
select a.rn, a.nu, cast(b.val + \',\' + a.val as varchar(100))as val
from Orign a
inner join recur b
on a.nu = b.nu and a.rn = b.rn+1
)
select nu, val
from recur a
where a.rn = (select max(rn)from recur b where a.nu = b.nu)
order by nu
drop table #Tmp
方法二：
create table #Tmp (nu int, val varchar(100))
insert into #Tmp values(1, \'a\')
insert into #Tmp values(2, \'b\')
insert into #Tmp values(2, \'c\')
insert into #Tmp values(3, \'d\')
insert into #Tmp values(3, \'e\')
insert into #Tmp values(3, \'f\')
insert into #Tmp values(4, \'g\')
insert into #Tmp values(4, \'h\')
insert into #Tmp values(4, \'i\')
select * from #Tmp
select \',\'+val as [text()] from #Tmp t2 for xml path (\'\')
select nu, stuff( (select \',\'+val as [text()] from #Tmp t2 where t1.nu= t2.nu for xml path (\'\')),1,1,\'\')
from #Tmp t1
group by nu
drop table #Tmp 阅读全文
类别：Sql Server 查看评论
create table #Tmp (nu int, val varchar(100))
insert into #Tmp values(1, \'a\')
insert into #Tmp values(2, \'b\')
insert into #Tmp values(2, \'c\')
insert into #Tmp values(3, \'d\')
insert into #Tmp values(3, \'e\')
insert into #Tmp values(3, \'f\')
select * from #Tmp
;with Orign as
(
select ROW_NUMBER() over(partition by nu order by nu) as rn, nu, val from #Tmp
),
recur as
(
select * from Orign where rn = 1
union all
select a.rn, a.nu, cast(b.val + \',\' + a.val as varchar(100))as val
from Orign a
inner join recur b
on a.nu = b.nu and a.rn = b.rn+1
)
select nu, val
from recur a
where a.rn = (select max(rn)from recur b where a.nu = b.nu)
order by nu
drop table #Tmp
方法二：
create table #Tmp (nu int, val varchar(100))
insert into #Tmp values(1, \'a\')
insert into #Tmp values(2, \'b\')
insert into #Tmp values(2, \'c\')
insert into #Tmp values(3, \'d\')
insert into #Tmp values(3, \'e\')
insert into #Tmp values(3, \'f\')
insert into #Tmp values(4, \'g\')
insert into #Tmp values(4, \'h\')
insert into #Tmp values(4, \'i\')
select * from #Tmp
select \',\'+val as [text()] from #Tmp t2 for xml path (\'\')
select nu, stuff( (select \',\'+val as [text()] from #Tmp t2 where t1.nu= t2.nu for xml path (\'\')),1,1,\'\')
from #Tmp t1
group by nu
drop table #Tmp 阅读全文
类别：Sql Server 查看评论