批量导入表数据

方法1：

  insert into select--->

  insert into tbl2  select id,treeLevel from tbl2

方法2：

  select into from--->

  select id,treeLevel into tbl1 from tbl2

示例：

alter function dbo.tblForJson(@SuperMan varchar(50),@TreeDepth int)
returns @tempSubGroup table(ID int identity(1,1),PersonName nvarchar(50),ParentID int,Treel int)
as
begin
    declare @i int   --树深度
    declare @tmpId int
    declare @curLevelInfo table(ParentID int,Person nvarchar(50))  --当前层

    set @i=0
    insert @tempSubGroup values(@SuperMan,0,@i) 
    while @i<@TreeDepth-1
    begin
        delete from @curLevelInfo
        insert into @curLevelInfo select ID,PersonName from @tempSubGroup where treel=@i 
        set @i=@i+1;
        insert into @tempSubGroup select junior,ParentID,@i from PTS_SubGroup 
        inner join Person on junior=Name right join @curLevelInfo on superior=Person 
        where superior=Person and treeLevel=1 and Coding=1
    end
    return
end