字符串分割 查询问题

[解决办法]
李四怎么变张三了

select id,'李四' as name from table where charindex(',李四,',','+Name+',')>0

USE test
GO

-->生成表table1

if object_id('table1') is not null 
drop table table1
Go
Create table table1([id] smallint,[Name] nvarchar(9))
Insert into table1
Select 1,N'张三,李四,王五,'
Union all Select 2,N'李四,'
Union all Select 3,N'李四,张三,'


DECLARE @Name NVARCHAR(50),@sql NVARCHAR(MAX)
SET @Name=N'李四'

SELECT @sql=ISNULL(@sql+' Union Select ','Select ')+LTRIM(id)+' As id,N'''+REPLACE(Name,',',''' As Name Union all Select '+LTRIM(id)+' As id,N''')+''' As Name' FROM table1
EXEC ('Select * from ('+@sql+') As t Where t.Name='''+@Name+'''')

/*
id          Name
----------- ----
1           李四
2           李四
3           李四
*/

SELECT id,@Name AS Name FROM table1 WHERE CHARINDEX(@Name,Name)>0

create table tyz(id int ,tname varchar(20))

insert tyz select 1, N'张三,李四,王五'
insert tyz select 2, N'李四'
insert tyz select 3, N'李四,张三'
insert tyz select 4, N'张三'



declare @name varchar(10)
set @name='李四'
select id,@name as name from tyz where substring(tname,charindex(@name,tname),len(@name))=@name