sql判断两字段内容是否相等，请高手指点呀。。。。。。

[我是一只小小小的菜鸟]

有一数据表 如下：

if object_id('tempdb.dbo.#A') is not null drop table #A
create table #A (ID INT IDENTITY(1,1),C1 VARCHAR(100),C2 VARCHAR(100))
insert into #A
select '|A|B|C|D','|D|C|A|'union all
select '|A|B|F|D','|D|F|A|B|'union all
select '|A|G|C|D','|D|G|A|'union all
select '|A|B|C|D','|D|C|A|'union all
select '|C|H|R|D','|D|C|H|'union all
select '|A|B|C|D','|D|C|A|B|'
select * from #A

就是说C2段中有的C1一定有 ，C1有的C2不一定有，就是C1包含于C2.如何判断这两这个字段中的字符是否相等呢。只是顺序乱掉而已。请各位高手指点指点。

[叶子]

--1、创建字符串分割函数
create function [dbo].[m_split](@c varchar(2000),@split varchar(2))   
  returns @t table(col varchar(200))   
  as   
    begin   
      while(charindex(@split,@c)<>0)   
        begin   
          insert @t(col) values (substring(@c,1,charindex(@split,@c)-1))   
            set @c = stuff(@c,1,charindex(@split,@c),'')   
        end   
      insert @t(col) values (@c)   
      return   
END

go
--2、创建字符串分割后的比较函数
create FUNCTION GetState
    (
      @s1 VARCHAR(20) ,
      @s2 VARCHAR(20)
    )
RETURNS INT
AS 
    BEGIN
        DECLARE @i INT
        DECLARE @j INT
        DECLARE @k INT
        SELECT  @i = COUNT(DISTINCT a.col)
        FROM    dbo.m_split(@s1, '|') a
                RIGHT JOIN ( SELECT *
                             FROM   dbo.m_split(@s2, '|')
                           ) b ON a.col = b.col
        WHERE   a.col IS NOT NULL

        SELECT  @j = COUNT(col)
        FROM    dbo.m_split(@s1, '|')
        WHERE   col IS NOT NULL

        IF ( @i = @j ) 
            SET @k = 0
        ELSE 
            SET @k = 1
        RETURN @k
    END

GO
--3、测试数据
declare  @A table(ID INT IDENTITY(1,1),C1 VARCHAR(20),C2 VARCHAR(20))
insert into @A
select '|A|B|C|D','|D|C|A|'union all
select '|A|B|F|D','|D|F|A|B|'union all
select '|A|G|C|D','|D|G|A|'union all
select '|A|B|C|D','|D|C|A|'union all
select '|C|H|R|D','|D|C|H|'union all
select '|A|B|C|D','|D|C|A|B|'
select * from @A WHERE dbo.GetState(C1,C2)=0

--4、运行结果
/*
ID          C1                   C2
----------- -------------------- --------------------
2           |A|B|F|D             |D|F|A|B|
6           |A|B|C|D             |D|C|A|B|
*/

[dawugui]

create table tb (ID INT IDENTITY(1,1),C1 VARCHAR(20),C2 VARCHAR(20))
insert into tb
select '|A|B|C|D','|D|C|A|'union all
select '|A|B|F|D','|D|F|A|B|'union all
select '|A|G|C|D','|D|G|A|'union all
select '|A|B|C|D','|D|C|A|'union all
select '|C|H|R|D','|D|C|H|'union all
select '|A|B|C|D','|D|C|A|B|'
go

select distinct t.* from tb t,
(
select a.ID , C1 = substring(a.C1 , b.number , charindex('|' , a.C1 + '|' , b.number) - b.number) 
from tb a join master..spt_values  b 
on b.type='p' and b.number between 1 and len(a.C1)
where substring('|' + a.C1 , b.number , 1) = '|'
) m where t.id = m.id and m.c1 <> '' and not exists(select 1 from
(
select a.ID , C2 = substring(a.C2 , b.number , charindex('|' , a.C2 + '|' , b.number) - b.number) 
from tb a join master..spt_values  b 
on b.type='p' and b.number between 1 and len(a.C2)
where substring('|' + a.C2 , b.number , 1) = '|'
) n where m.id = n.id and n.c2 <> '' and m.c1 = n.c2)

drop table tb

/*
ID          C1                   C2                   
----------- -------------------- -------------------- 
1           |A|B|C|D             |D|C|A|
3           |A|G|C|D             |D|G|A|
4           |A|B|C|D             |D|C|A|
5           |C|H|R|D             |D|C|H|

（所影响的行数为 4 行）
*/

[gw6328]

select * from #A where ID not in
(
select id from
(
select id,cast('<root1><c1 v="'+REPLACE(stuff(c1,1,1,''),'|','"/><c1 v="')+'"/></root1>' as xml) as x1
,cast('<root2><c2 v="'+REPLACE(stuff(stuff(c2,1,1,''),LEN(c2)-1,1,''),'|','"/><c2 v="')+'"/></root2>' as xml) as x2
from #a 
) x
where 
exists(
	select t1.c.value('@v','varchar(100)') from x.x1.nodes('/root1/c1') t1(c)
	except
	select t2.c.value('@v','varchar(100)') from x.x2.nodes('/root2/c2') t2(c)
)
)

/*
ID          C1                                  C2
----------- ----------------- -----------------
2           |A|B|F|D          |D|F|A|B|
6           |A|B|C|D          |D|C|A|B|

*/

[gw6328]

哦没注意。把前面not in 变成 in后面 exists变成not exists效率会高一点点

[我是一只小小小的菜鸟]

哈哈 谢谢各位 谢谢！