SQLServer字符串批量拆分得方法

其实拆分和批量拆分的方法是一样的，所谓批量就是用out apply来调用单个拆分函数。

/*
SQLServer字符串拆分函数,by jinjazz

--原始数据
id          names
----------- --------------------
1           jinjazz,blog,csdn
2           sql,ms

--生成的数据
id          rn          name
----------- ----------- ----------
1           1           jinjazz
1           2           blog
1           3           csdn
2           1           sql
2           2           ms


*/

set nocount on
use tempdb
go
if (object_id ('f_test' ) is not null )
    drop function f_test
go
create function f_test (@a varchar (max ))
returns @t table (rn int , v varchar (max ))
as
begin
    insert into @t
    select b. * from (
    select convert (xml , '<v>' + replace (@a , ',' , '</v><v>' )+ '</v>' ) as f )a
    outer apply
    (
        SELECT rn = row_number ()over (order by getdate ()), t . c . value ('.' , 'varchar(max)' ) AS f
                 FROM a . f . nodes ('//v' ) AS t (c )
    )b   
    return
end
go


declare @t table (id int , names varchar (20 ))
insert into @t select 1 , 'jinjazz,blog,csdn'
insert into @t select 2 , 'sql,ms'

select * from @t
select a . id , rn , b. v as name from @t a outer apply dbo . f_test (a . names ) b

set nocount off