ms-SQL 递归调用

----递归函数--------------------------------------------------------------------------



create  function dbo.f_get_data_by_recursion

 (

  @group_father_id int

 )

  returns @groups_result table (group_id int,group_name varchar(50),group_father_id int,last_count int)

 begin

  declare @count as int

  set @count=1

  

  insert @groups_result select *,@count from groups where group_id=@group_father_id 

  while @@rowcount<>0

  begin

   set @count=@count+1

   insert @groups_result

    select g.group_id,g.group_name,g.group_father_id,@count from groups g,@groups_result gr

     where g.group_father_id=gr.group_id and gr.last_count=@count-1

  end

  return      

 end



GO

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----调用举例--------------------------------------------------------------------------



create table dbo.groups

 (

  group_id int,

  group_name varchar(50),

  group_father_id int

 )





 declare @loop as int

 set @loop =1

 while @loop < 1000

 begin

  insert into groups (group_id,group_name,group_father_id) values (@loop,'name',@loop -1)

  set @loop =@loop +1

 end



set @loop =2001

 while @loop < 2500

 begin

  insert into groups (group_id,group_name,group_father_id) values (@loop,'name',@loop -1)

  set @loop =@loop +1

 end





 select * from groups

 select * from f_get_data_by_recursion(2001)



drop table dbo.groups

 drop function dbo.f_get_data_by_recursion

View Code