declare @a varchar(1000)
set @a=' select '''+replace(@a,',',''' union all select ''')+''''
exec('insert table(fiele) '+@a)
set @a=' select '''+replace(@a,',',''' union all select ''')+''''
exec('insert table(fiele) '+@a)
set @s='A,B,C'select 拆分结果=substring(@s,b.id,charindex(',',@s+',',b.id)-b.id)
from(select name=@s) a join(
select id=a.id+b.id+1
from(
select id=0 union all select 1
union all select id=2 union all select 3
union all select id=4 union all select 5
union all select id=6 union all select 7
union all select id=8 union all select 9
) a,(
select id=0 union all select 10
union all select id=20 union all select 30
union all select id=40 union all select 50
union all select id=60 union all select 70
union all select id=80 union all select 90
) b
) b on substring(','+name,b.id,1)=','/*--拆分结果
拆分结果
-----------------------------------------------
A
B
C(所影响的行数为 3 行)
--*/
a.id
是什么来的?