123456789

id
1
2
3
4
5
6
7
8
9

declare @tab table(id nvarchar(2))
declare @str nvarchar(50)
declare @len int
declare @i int

select @str='123456789'
select @i=1
select @len=len(@str)

while(@i<=@len)
begin
    insert into @tab(id) values(substring(@str,@i,1))
    select @i=@i+1
end
select * from @tab

------解决方案--------------------
SQL code

declare @str nvarchar(50)
set @str='123456789'

select substring(@str,number,1) col
from master..spt_values
where [type] = 'p' and number between 1 and len(@str)

/**************

col
----
1
2
3
4
5
6
7
8
9

(9 行受影响)

------解决方案--------------------
SQL code


declare @str varchar(100)
set @str='123456789'

select SUBSTRING(@str,s.number + 1,1) from master..spt_values s
where s.type='p' and s.number <len(@str)

------解决方案--------------------

SQL code

DECLARE @ID NVARCHAR(100)
SET @ID = '123456789'
SELECT TOP 100 ID=IDENTITY(INT,1,1) INTO #T FROM SYSOBJECTS,SYSCOLUMNS
SELECT ID = SUBSTRING(@ID,ID,1) FROM #T WHERE ID <= LEN(@ID)
DROP TABLE #T

------解决方案--------------------
SQL code
if OBJECT_ID('tb') is not null 
drop table tb
 go 
declare @t varchar(800)
set @t='123456789'
declare @i int
set @i=1
create table tb(id varchar(10))
 
while @i<= LEN(@t)
begin 
 insert into tb values(SUBSTRING(@t,@i,1)) 
 -- set @t=SUBSTRING(@t,@i,@i+1) 
 set @i=@i+1  
 end;
 select * from tb



id
----------
1
2
3
4
5
6
7
8
9

(9 行受影响)

------解决方案--------------------
SQL code
 
declare @t varchar(800)
set @t='123456789'
 
 select SUBSTRING(@t,number,1) 
 from master..spt_values where number between 1 and LEN(@t) and type='p'

----
1
2
3
4
5
6
7
8
9

(9 行受影响)

------解决方案--------------------
SQL code
declare @s varchar(max)
set @s='sfefgthg15461'
select SUBSTRING(@s,number+1,1) from master..spt_values where type='p' and number<=LEN(@s)