Query - Find Master Records - Doesnt Child Rec

Question

Hello Experts,
BANNER
Oracle8i Enterprise Edition Release 8.1.7.4.0 - Production
PL/SQL Release 8.1.7.4.0 - Production
CORE 8.1.7.0.0 Production
TNS for IBM/AIX RISC System/6000: Version 8.1.7.4.0 - Production
NLSRTL Version 3.4.1.0.0 - Production
Below is my table - ORG_VALUE
ITEM_ID  ITEM_TYPE ORG_ID
1000     TEST      222
1000     TEST_1    223
2000     TEST      322
2000     TEST_1    323
3000     TEST      222
4000     TEST      322222,322- Master Org id... 223,323 - Child Org id
I need to fetch those records which doesnt have child record for particular item in same table.
E.g; if 1000 item_id for 222 org id, then def. there should be child record 1000 for 223 org_id.
Similar for 322 and 323.
OUTPUT
ITEM_ID  ITEM_TYPE ORG_ID
3000     TEST      222
4000     TEST      322Tried the following query...
SELECT     *
FROM          ORG_VALUE a
WHERE      NOT EXISTS (SELECT     1  FROM     ORG_VALUE b
          WHERE      a.item_id = b.item_id
                            and org_id IN (223, 323))
order by item_id;Is there any other query better than this one>?
Please help...

Answer 1

Like this (assuming child org ID always ends with 3)?
  1  WITH d AS (
  2  SELECT 1000 as item_id, 'TEST' as item_type, 222 AS org_id  FROM dual UNION ALL
  3  SELECT 1000,'TEST_1', 223 FROM dual UNION ALL
  4  SELECT 2000,'TEST', 322 FROM dual UNION ALL
  5  SELECT 2000,'TEST_1', 323 FROM dual UNION ALL
  6  SELECT 3000,'TEST', 222 FROM dual UNION ALL
  7  SELECT 4000,'TEST', 322 FROM dual)
  8* SELECT item_id FROM d GROUP BY item_id HAVING(MAX(MOD(org_id,10))) != 3
SQL> /
   ITEM_ID
      4000
      3000Lukasz