[8i] Way to add a specific nbr of rows based on a column value? (Follow-up)

Question

I'm dealing with an old database that's being phased out, and here's the version info (yes, it's really old):
Oracle8i Enterprise Edition Release 8.1.7.2.0 - Production
PL/SQL Release 8.1.7.2.0 - Production
CORE 8.1.7.0.0 Production
TNS for HPUX: Version 8.1.7.2.0 - Production
NLSRTL Version 3.4.1.0.0 - Production
I believe Frank Kulash gave me the solution to my original question, which was:
Sample data:
CREATE TABLE     testabc
(     item     CHAR(25)
,     qty     NUMBER(13,4)
INSERT INTO     testabc
VALUES ('Item1',1);
INSERT INTO     testabc
VALUES ('Item2',3);
INSERT INTO     testabc
VALUES ('Item3',1);
INSERT INTO     testabc
VALUES ('Item4',2); Desired results:
ITEM                                  QTY
Item1                               1.000
Item2                               3.000
--blank row
--blank row
Item3                               1.000
Item4                               2.000
--blank rowAnd the solution:
SELECT       CASE
          WHEN c.n = 1  THEN  t.item
       END          AS item_col
,       CASE
           WHEN c.n = 1  THEN  t.qty
       END          AS qty
FROM       testabc  t
          SELECT     ROWNUM     AS n
          FROM     all_objects
          WHERE     ROWNUM     <= 10     -- If you know an upper bound
       )          c
WHERE       c.n     <= t.qty
ORDER BY  t.item
,            c.n
;Now, it turns out there are only some items which need these extra rows, but I'm not sure if it's possible to only include extra rows for certain items or not...
Here's my new sample data:
CREATE TABLE     testabc1
(     s     CHAR(1)
,     item     CHAR(25)
,     qty     NUMBER(13,4)
INSERT INTO     testabc1
VALUES ('*','Item1',1);
INSERT INTO     testabc1
VALUES ('','Item2',3);
INSERT INTO     testabc1
VALUES ('*','Item3',3);
INSERT INTO     testabc1
VALUES ('*','Item4',2);And my new desired results: (any row with an asterisk gets extra rows, if the qty is greater than 1)
S ITEM                                  QTY
* Item1                               1.000
  Item2                               3.000
* Item3                               3.000
--blank row
--blank row
* Item4                               2.000
--blank rowEdited by: user11033437 on Jan 3, 2012 9:27 AM (fixed missing asterisk in desired results)

Answer 1

Hi,
Here's a slightly simpler way:
SELECT       CASE
          WHEN c.n = 1  THEN  t.item
       END          AS item_col
,       CASE
           WHEN c.n = 1  THEN  t.qty
       END          AS qty
FROM       testabc1  t
          SELECT     ROWNUM     AS n
          FROM     all_objects
          WHERE     ROWNUM     <= 10     -- If you know an upper bound
       )          c
WHERE       c.n     <= CASE
                   WHEN  t.s  = '*'
                   THEN  t.qty
                 ELSE  1
             END
ORDER BY  t.item
,            c.n
;This is just like the previous solution, except that the WHERE clause, which was originally
WHERE       c.n     <= t.qtyis now
WHERE       c.n     <= CASE ... END
user11033437 wrote:... And my new desired results: (any row with an asterisk gets extra rows, if the qty is greater than 1)
S ITEM                                  QTY
* Item1                               1.000
Item2                               3.000
Item3                               3.000
--blank row
--blank row
* Item4                               2.000
--blank row
S should be '*' on the output row where item='Item3', right?
I'm sure you know how to get the s column in the output, but, since I've already tried it:
SELECT       CASE
          WHEN c.n = 1  THEN  '*'
       END                AS s
,       CASE
          WHEN c.n = 1  THEN  t.item
       END          AS item_col
,       CASE
           WHEN c.n = 1  THEN  t.qty
       END          AS qty
FROM       testabc1  t
          SELECT     ROWNUM     AS n
          FROM     all_objects
          WHERE     ROWNUM     <= 10     -- If you know an upper bound
       )          c
WHERE       c.n     <= CASE
                   WHEN  t.s  = '*'
                   THEN  t.qty
                 ELSE  1
             END
ORDER BY  t.item
,            c.n
;Edited by: Frank Kulash on Jan 3, 2012 11:11 AM