Cursor based on a condition

Question

Hi all,
I have two tables like
Table_1
col1
A
B
C
D
E
Table_2
col1 col2
A 1
A     2
A     3
B     1
C     3
C     4
C     5
D     2
D     3
D     6
I need to fetch each row from Table_1 and select col2 for corresponding col1 value in Table_2. This should be a very trivial task for you Oracle Gurus. Please help me out.
I can declare a cursor for Table_1 to get each row. But for the cursor to Table_2, how can I pass the condition about col1 value? Am I missing anything very basic? Can I use PL/SQL collections (pl/sql tables or arrays for this)? If so, how? Please guide me.
FYI, my Oracle version is Release 9.2.0.6.0
Thanks in advance
Sarma.

Answer 1

Sure you can:
DECLARE
  CURSOR c1
  IS
    SELECT *
      FROM table_1
  CURSOR c2(
    p_col1 table_2.col1%TYPE
  IS
    SELECT *
      FROM table_2
     WHERE col1 = p_col1
BEGIN
  FOR r1 IN c1
  LOOP
    -- do whatever you want with table_1 data
    FOR t2 IN c2(r1.col1)
    LOOP
      NULL; -- do whatever you want with table_2 data
    END LOOP; 
  END LOOP;
  -- COMMIT; if needed should go here
END;
not tested
C.