The rows of a query become columns

Question

Hi , everybody
I have an aggregated query . The format of the result is :
COL1 COL2 COL3
==== ==== ====
VAL1 1800 CVAL1
VAL1 780 CVAL2
VAL1 800 CVAL3
VAL2 3450 CVAL2
VAL2 890 CVAL3
e.t.c.
I want ,the quicker way, the format of the result to be as follows (regarding the above sample data):
COL1 CVAL1 CVAL2 CVAL3
==== ==== ===== ======
VAL1 1800 780 800
VAL2 3450 890
In other words , I want the each value in COL1 appear just one time and the data in other columns to be developed ...as columns
Thanks , Simon

Answer 1

Hi,
This will help.
ABANSVI@CTSQA>SELECT * FROM TEST;
COL1             COL2 COL3
VAL1             1800 CVAL1
VAL1              780 CVAL2
VAL1              800 CVAL3
VAL2             3450 CVAL2
VAL2              890 CVAL3
Elapsed: 00:00:00.47
ABANSVI@CTSQA>SELECT COL1,
  2  MAX(DECODE(COL3, 'CVAL1', SM, NULL)) CVAL1,
  3  MAX(DECODE(COL3, 'CVAL2', SM, NULL)) CVAL2,
  4  MAX(DECODE(COL3, 'CVAL3', SM, NULL)) CVAL3
  5  FROM (
  6  SELECT COL1, COL3, SUM(COL2) SM FROM TEST
  7  GROUP BY COL1, COL3)
  8  GROUP BY COL1;
COL1            CVAL1      CVAL2      CVAL3
VAL1             1800        780        800
VAL2                        3450        890
Elapsed: 00:00:00.34Vineet