一。学习地址:点击打开链接
二。学习范例:
create table tb(id int, value varchar(10))
insert into tb values(1,'aa')insert into tb values(1,'bb')
insert into tb values(2,'aaa')
insert into tb values(2,'bbb')
insert into tb values(2,'ccc')
go
/* stuff(param1, startIndex, length, param2)
说明:将param1中自startIndex(SQL中都是从1开始,而非0)起,删除length个字符,然后用param2替换删掉的字符。*/
SELECT id,
value = stuff
((SELECT ',' + value
FROM tb AS t
WHERE t .id = tb.id FOR xml path('')), 1, 1, '')
FROM tb
GROUP BY id
三。实践范例:
select stuff((select ',' + scardnum from fa_cards for xml path('')),1,1,'')