Converting Columns to rows in Oracle 10g

Question

Hi
i need hint to convert rows to columns.i had given the data strucure and expected output
Source Table
BU_ID     Prod_id     total_clients   Tot_men        Totwomen
101        AAA           85              50          35
101        BBB           40              20          20Expected Output
BU_ID  Prod_id    Clint_info          Values
101      AAA          total_clients      85
101      AAA          Tot_men          50
101      AAA          totwomen        35
101      BBB           total_clients      40
101      BBB           tot_men          20
101      BBB           totwomen        20Thanks
Edited by: Sami on Aug 1, 2012 8:25 PM

Answer 1

Hi,
Cross-join your table with a Counter Table , a table (or result set, as in the example below) that counts from 1 up to the number of columns you want to unpivot, like this:
WITH     cntr     AS
     SELECT     LEVEL     AS n
     FROM     dual
     CONNECT BY     LEVEL <= 3     -- Number of columns to be unpivoted
SELECT       s.bu_id
,       s.prod_id
,       CASE  c.n
          WHEN  1  THEN  'total_clients'
          WHEN  2  THEN  'total_men'
          WHEN  3  THEN  'total_women'
       END          AS client_info
,       CASE  c.n
          WHEN  1  THEN  total_clients
          WHEN  2  THEN  total_men
          WHEN  3  THEN  total_women
       END          AS values
FROM            source_table  s
CROSS JOIN     cntr           c
ORDER BY  s.bu_id
,            s.prod_id
,       c.n
;If you'd care to post CREATE TABLE and INSERT statements for your sample data, then I could test this.
The values column that you create can only have 1 data type. If the original, unpivoted columns have different data types, you may need to convert some of them in the CASE expression that defines values.