A real noodle-scratcher SELECT problem... :)

Question

Hi. I'm hoping someone can help me with a little problem I have:
Here's the raw data I have:
TABLE: MYDATA
PHASE | CONTRACT_NAME | PLAN_CRITERIA | AMOUNT
1 | STAIRS CONTRACT | 2% | 900
1 | FINISH CARPENTRY | 2A | 1000
1 | FINISH CARPENTRY | 2B | 1100
1 | FINISH CARPENTRY | 2C | 1200
Here's what I want as a sql result:
PHASE | CONTRACT_NAME | PLAN_CRITERIA | AMOUNT
1 | STAIRS CONTRACT | 2A | 900
1 | FINISH CARPENTRY | 2A | 1000
1 | STAIRS CONTRACT | 2B | 900
1 | FINISH CARPENTRY | 2B | 1100
1 | STAIRS CONTRACT | 2C | 900
1 | FINISH CARPENTRY 2C | 1200
I can't change the raw data, but I need a dynamic result (based on a sql statement) that uses the '%' wildcard and explodes the missing rows.
Stairs has a 2% plan criteria and Finish Carpentry shows it has plans 2A, 2B, and a 2C. Because of the match between 2% and 2A, 2B, 2C; I want to repeat the Stairs row for each matching Finish Carpentry row.
I hope this makes sense and someone can help me out. I'd sure appreciate it and it'd practically GUARANTEE a Christmas card for the kind soul who can come up with the solution. :)
Thanks!
Steve

Answer 1

I'm not sure if this works well the way you want it and I'm sure there are better solutions, but can give you an idea where to start.
PLEASE TEST IT,
SQL> l
  1  WITH t AS
  2       (
  3  SELECT 1 AS phase, 'STAIRS CONTRACT' contract_name, '2%' plan_criteria ,900 amount FROM DUAL
  4           UNION ALL
  5           SELECT 1, 'FINISH CARPENTRY', '2A', 1000 FROM DUAL
  6           UNION ALL
  7           SELECT 1, 'FINISH CARPENTRY', '2B', 1100 FROM DUAL
  8           UNION ALL
  9     SELECT 1, 'FINISH CARPENTRY', '2C', 1100 FROM DUAL
10           UNION ALL
11           SELECT 1, 'FINISH CARPENTRY', '2D', 1200 FROM DUAL
12     UNION ALL
13     SELECT 1, 'FINISH CARPENTRY', '5D', 1200 FROM DUAL
14     UNION ALL
15     SELECT 1, 'TEST CARPENTRY', '2X', 1200 FROM DUAL)
16  SELECT *
17    FROM (SELECT t.phase, t.contract_name, t2.plan_criteria
18                ,DECODE (t.plan_criteria, t.plan_criteria, t.amount, t2.amount)
19            FROM t, t t2
20           WHERE t2.plan_criteria LIKE t.plan_criteria)
21   WHERE plan_criteria <> '2%'
22*  order by plan_criteria,contract_name
SQL> /
     PHASE CONTRACT_NAME    PL DECODE(T.PLAN_CRITERIA,T.PLAN_CRITERIA,T.AMOUNT,T2.AMOUNT)
         1 FINISH CARPENTRY 2A                                                       1000
         1 STAIRS CONTRACT  2A                                                        900
         1 FINISH CARPENTRY 2B                                                       1100
         1 STAIRS CONTRACT  2B                                                        900
         1 FINISH CARPENTRY 2C                                                       1100
         1 STAIRS CONTRACT  2C                                                        900
         1 FINISH CARPENTRY 2D                                                       1200
         1 STAIRS CONTRACT  2D                                                        900
         1 STAIRS CONTRACT  2X                                                        900
         1 TEST CARPENTRY   2X                                                       1200
         1 FINISH CARPENTRY 5D                                                       1200
11 rows selected.