create table tb(id int,value varchar(30))
insert into tb values(1,‘aa,bb‘)
insert into tb values(2,‘aaa,bbb,ccc‘)
go
--方法1.使用临时表完成
SELECT TOP 8000 id = IDENTITY(int,1,1) INTO # FROM syscolumns a,syscolumns b
SELECT A.id,value = SUBSTRING(A.[value],B.id,CHARINDEX(‘,‘,A.[value] + ‘,B.id) - B.id)
FROM tb A,# B
WHERE SUBSTRING(‘,‘ + A.[value],1) = ‘,‘
DROP TABLE #
--方法2.如果数据量小,可不使用临时表
select a.id,value = substring(a.value,b.number,charindex(‘,a.value + ‘,b.number) - b.number)
from tb a join master..spt_values b
on b.type=‘p‘ and b.number between 1 and len(a.value)
where substring(‘,‘ + a.value,‘
create table tb(id int,ccc‘)
go
--方法1.使用xml完成
SELECT A.id,B.value FROM
(
SELECT id,[value] = CONVERT(xml,‘‘ + REPLACE([value],‘‘) + ‘‘) FROM tb
) A OUTER APPLY
(
SELECT value = N.v.value(‘.‘,‘varchar(100)‘) FROM A.[value].nodes(‘/root/v‘) N(v)
) B
--方法2.使用CTE完成
;with tt as
(select id,[value]=cast(left([value],[value]+‘,‘)-1) as nvarchar(100)),Split=cast(stuff([value]+‘,‘),‘‘) as nvarchar(100)) from tb
union all
select id,[value]=cast(left(Split,Split)-1) as nvarchar(100)),Split= cast(stuff(Split,Split),‘‘) as nvarchar(100)) from tt where split>‘‘
)
select id,[value] from tt order by id option (MAXRECURSION 0)
DROP TABLE tb