我有张表里字段是 aaa,bbb,ccc,ddd, 这样使用逗号隔开的字符,通过SQL语法怎样做解析把aaa bbb每个值取出来?
谢谢!
------解决方案--------------------
declare @str varchar(4000)
set @str = 'aaa,bbb,ccc,ddd '
declare @sql varchar(8000)
set @sql = 'select ' + replace(@str, ', ', ' union all select ')
exec(@sql)
------解决方案--------------------
CREATE FUNCTION dbo.f_splitSTR(
@s varchar(8000), --待分拆的字符串
@split varchar(10) --数据分隔符
)RETURNS @re TABLE(col varchar(100))
AS
BEGIN
--创建分拆处理的辅助表(用户定义函数中只能操作表变量)
DECLARE @t TABLE(ID int IDENTITY,b bit)
INSERT @t(b) SELECT TOP 8000 0 FROM syscolumns a,syscolumns b
INSERT @re SELECT SUBSTRING(@s,ID,CHARINDEX(@split,@[email protected],ID)-ID)
FROM @t
WHERE ID <=LEN(@s+ 'a ')
AND CHARINDEX(@split,@[email protected],ID)=ID
RETURN
END
GO
select * from dbo.f_splitSTR( 'aaa,bbb,ccc,ddd ', ', ')
go
drop function dbo.f_splitSTR
/*
col
----------------------------------------------------------------
aaa
bbb
ccc
ddd
(4 row(s) affected)
*/