最近，在论坛中，遇到了不少比较难的sql问题，虽然自己都能解决，但发现过几天后，就记不起来了，也忘记解决的方法了。
所以，觉得有必要记录下来，这样以后再次碰到这类问题，也能从中获取解答的思路。
请教一个MSSQLSELECT语名的写法
http://bbs.csdn.net/topics/390649166?page=1#post-396149924
表结构
id ids
1 3,8,83,92,215,7
传入一个值8,92要取出3,83,215,7
即是取出不存在于传入ID串其它所有ID都取出来.
请问这个SELECT 语语应该怎么写。
递归replace，我的解法：
-
drop
table t
-
go
-
-
create
table t(
id
int, ids
varchar(
100))
-
-
insert
into t
-
select
1 ,
'3,8,83,92,215,7'
-
go
-
-
-
-
declare @a
varchar(
100) =
'8,7'
-
-
;with tt
-
as
-
(
-
select
id, ids,@a+
','
as a,ids+
','
as ids_t
-
from t
-
where ids
like (
'%' +
REPLACE(@a,
',',
'%') +
'%')
-
),
-
-
ttt
-
as
-
(
-
select
id,ids,
-
cast(a
as
varchar(
max))
as a,
-
cast(ids_t
as
varchar(
max))
as ids_t ,
-
1
as
level
-
from tt
-
-
union all
-
-
select
id,ids,
-
cast(
stuff(a,
1,
charindex(
',',a),
'')
as
varchar(
max)) ,
-
cast(
replace(ids_t,
left(a,
charindex(
',',a)),
'')
as
varchar(
max)),
-
level +
1
-
from ttt
-
where
charindex(
',',a) >
0
-
-
)
-
-
-
select
id, ids_t
-
from
-
(
-
select
id, ids,
left(ids_t,
len(ids_t)
-1)
as ids_t,
-
ROW_NUMBER()
over(
partition
by
id
order
by
level
desc)
as
rownum
-
from ttt
-
)a
-
where
rownum =
1
-
/*
-
id ids_t
-
1 3,83,92,215
-
*/
