How can i write Recursive Program in PL/SQL

Question

Hi, i am new to Pl/sql Programming can any one suggest me with an example.
I need to implenet this logic in one of my Procedure functionality

Answer 1

I have to find whether my Userkey belongs to some groups and in that Gr
oups there can be many more subgroup which means my user is indirectly
associated with all Groups and Sub Groups so i need to check with the levels
till the time there is no SubGroups associated with my the Main Group G1 are
there.Seems you just need the hierarchy query:
SQL> SELECT groups.grp, level
  2  from
  3  (
  4  select 'Group' grp, null parent from dual
  5  union all
  6  select 'Subgroup 1', 'Group' from dual
  7  union all
  8  select 'Subgroup 2', 'Group' from dual
  9  union all
10  select 'SubSub 1', 'Subgroup 2' from dual
11  union all
12  select 'SubSub 2', 'Subgroup 1' from dual
13  ) groups
14  start with grp = (select grp from
15  (
16   select 'Key1' key, 'Subgroup 1' grp from dual
17   union all
18   select 'Key2' key, 'Subgroup 2' grp from dual
19  ) userkeys
20  where key = 'Key1'
21  )
22  connect by prior groups.grp = groups.parent
23  /
GRP             LEVEL
Subgroup 1          1
SubSub 2            2Rgds.