求sql做法,不同记录同一字段合并字符串
比如有表T
f1 f2
-------------
1 aaa
2 bbb
2 ccc
希望获得
f1 f2
-------------
1 aaa
2 bbbccc
怎样写好?
[解决办法]
with S as
(
select f1,f2 from 表T group by f1,f2
)
select t.f1,stuff((select ''+t2.f2 from S t2 where t2.f1 = t.f1 for xml path('')),1,O,'')'f2'
from S t
group by t.f1
create table 表T
(f1 int, f2 varchar(10))
insert into 表T
select 1, 'aaa' union all
select 2, 'bbb' union all
select 2, 'ccc' union all
select 2, 'ccc'
select f1,f2 from 表T
/*
f1 f2
----------- ----------
1 aaa
2 bbb
2 ccc
2 ccc
(4 row(s) affected)
*/
select a.f1,
replace((select distinct '
[解决办法]
'+f2
from 表T b
where b.f1=a.f1
for xml path('')),'
[解决办法]
','') 'f2'
from 表T a
group by a.f1
/*
f1 f2
----------- -------------
1 aaa
2 bbbccc
(2 row(s) affected)
*/