实现类似split功能(charindex)

1.存储过程实现


create procedure sp_split_string


(


@string NVARCHAR(4000)


)


AS


BEGIN


DECLARE @object_id nvarchar(500)


DECLARE @i INT


DECLARE @len INT


print @string


IF (@string IS NULL) OR (LTRIM(@string) = '')


RETURN




WHILE CHARINDEX(',',@string) > 0


BEGIN


SET @len = LEN(@string)


SET @i = CHARINDEX(',', @string)


SET @object_id = LEFT(@string, @i-1)




INSERT INTO a (id) VALUES (@object_id)--少做修改，改成需要的sql语句即可


SET @string = RIGHT(@string, @len - @i)


END


SET @object_id = @string


INSERT INTO a (id) VALUES (@object_id)--少做修改，改成需要的sql语句即可


END


go




--测试


-- select * from a


-- exec sp_split_string '102,103,105,106,107,108,200,500,306,408'


-- select * from a
2.一个用于处理分隔","的函数tf_split_str


--1. 建立测试数据


--1.1 create table TypeAdv


CREATE TABLE TypeAdv


(


id int,


TypeName varchar(200)


)


--1.2 insert data


insert into TypeAdv(id,TypeName) values(1,'电脑网络')


insert into TypeAdv(id,TypeName) values(2,'游戏动漫')


insert into TypeAdv(id,TypeName) values(3,'软件下载')


insert into TypeAdv(id,TypeName) values(4,'商务商铺')


insert into TypeAdv(id,TypeName) values(5,'建站服务')


insert into TypeAdv(id,TypeName) values(6,'门户综合')


insert into TypeAdv(id,TypeName) values(7,'影视音乐')


insert into TypeAdv(id,TypeName) values(8,'休闲娱乐')


insert into TypeAdv(id,TypeName) values(9,'生活资讯')


insert into TypeAdv(id,TypeName) values(10,'文学小说')




--1.3 create table TypeAdv


CREATE TABLE GroupAdv


(


id int,


GroupName varchar(200),


IntentionSet varchar(200)


)


--1.4 insert data


insert into GroupAdv(id,GroupName,IntentionSet) values(5,'广告分组一','1,2,3,4,5,6,7,10')


insert into GroupAdv(id,GroupName,IntentionSet) values(6,'广告分组二','1,2,3,4,5,6')


--2. 创建分隔“，”的函数


CREATE FUNCTION tf_split_str


(


@string NVARCHAR(4000)


)


RETURNS varchar(4000)


AS


BEGIN


DECLARE @object_id nvarchar(400)


DECLARE @i INT


DECLARE @len INT


declare @return varchar(400)


set @return=''




IF (@string IS NULL) OR (LTRIM(@string) = '')


RETURN @return




WHILE CHARINDEX(',',@string) > 0


BEGIN


SET @len = LEN(@string)


SET @i = CHARINDEX(',', @string)


SET @object_id = LEFT(@string, @i-1)


select @return = @return+','+TypeName from TypeAdv where id = @object_id


SET @string = RIGHT(@string, @len - @i)




END




SET @object_id = @string


select @return = @return+','+TypeName from TypeAdv where id = @object_id


set @return = stuff(@return,1,1,'')


RETURN @return


END


--3.测试


select b.id,b.GroupName,dbo.tf_split_str(b.IntentionSet) from GroupAdv b