tsql 循环id读取

declare @IDList as varchar(max)
declare @ID as int
declare @i as int
set @IDList=''

select @IDList=@IDList + cast(id as varchar(50)) + ',' from table
while CharIndex(',',@IDList)<>0
Begin
    set @ID = SubString(@IDList,1,CharIndex(',',@IDList)-1)
    print(@ID)

    set @IDList = Replace(','+@IDList,','+Cast(@ID as nvarchar(50))+',','')
End