如何使用游标及递归实现父子部门代码搜索
初时条件时我有一个table   ,里面记录的是几个部门代码 
 我想找到这几个部门代码所对应的子部门,然后根据找出来的子部门 
 再去找其子部门(部门层级不清楚,且各部门的子部门不唯一)。 
 高手们是否有此类功能的现成代码,发出来让寡人研究下,寡人将不胜感激!
------解决方案--------------------create table t_1(code varchar(10),parent varchar(10)) 
 insert into t_1(code,parent) 
 select  'A ', '0 ' 
 union all select  'E ', 'A ' 
 union all select  'E01 ', 'E ' 
 union all select  'E02 ', 'E '   
 create table t_2(code varchar(10),value int) 
 insert into t_2(code,value) 
 select  'E01 ',3 
 union all select  'E02 ',4   
 --递归取下级 
 create function f_getchild(@code varchar(10)) 
 returns @t table(code varchar(10)) 
 as 
 begin 
 declare @t_temp table(id int identity(1,1),child varchar(10)) 
 insert into @t(code) 
 select code from t_1 where Parent = @code   
 insert into @t_temp(child) 
 select code from t_1 where Parent = @code   
 declare @child_temp  varchar(10),@max_id  int,@min_id int 
 select @max_id = max(id),@min_id = min(id) from @t_temp 
 while @min_id  <= @max_id 
 begin 
 select @child_temp = child from @t_temp where id = @min_id 
 insert into @t(code) 
 select * from dbo.f_getchild(@child_temp) 
 select @min_id = @min_id + 1 
 end 
 return 
 end 
 --调用 
 select code from dbo.f_getchild( 'E01 ')