Transform data into columns

Question

hello
i would like to transform rows into columns and need your help
i have
table orders
where we have two columns
orderid,orderdate
orderid     order_date
1234     9/10/2009
4555     10/1/2009i have order_codes
have 3 columns
orderid
desc
value
data for order _codes
orderid     desc     value
1234     ch_code1     5789
1234     ch_date     10/20/2009
1234     ch_miscval     678.9
1234     ch_charge     765
4555     ch_code1     9999
4555     ch_date     10/0/2009
4555     ch_miscval     78.9now
i need to transform data like this
orderid ==     ch_code1      ==ch_date ==     ch_miscval ==     ch_charge ==     order_date
1234 ==     5789 ==     10/20/200  ==    678.9 ==     765      == 9/10/2009
4555 ==     9999 ==     10/1/2009      == 78.9 ==     ---      == 10/1/2009any help is appreciated
thank you
Edited by: vg on Nov 2, 2010 9:47 AM

Answer 1

try this. Hope this helps
/* Formatted on 2010/11/02 13:29 (Formatter Plus v4.8.8) */
WITH order_desc AS
     (SELECT 1234 orderid, 'ch_code1' descp, '5789' VALUE
        FROM DUAL
      UNION ALL
      SELECT 1234, 'ch_date', '10/20/2009'
        FROM DUAL
      UNION ALL
      SELECT 1234, 'ch_miscval', '678.9'
        FROM DUAL
      UNION ALL
      SELECT 1234, 'ch_charge', '765'
        FROM DUAL
      UNION ALL
      SELECT 4555, 'ch_code1', '9999'
        FROM DUAL
      UNION ALL
      SELECT 4555, 'ch_date', '10/0/2009'
        FROM DUAL
      UNION ALL
      SELECT 4555, 'ch_miscval', '78.9'
        FROM DUAL),
     order_t AS
     (SELECT 1234 orderid, SYSDATE order_date
        FROM DUAL
      UNION ALL
      SELECT 4555, SYSDATE
        FROM DUAL)
SELECT   a.orderid, MAX (DECODE (descp, 'ch_code1', VALUE, NULL)) ch_code1,
         MAX (DECODE (descp, 'ch_date', VALUE, NULL)) ch_date,
         MAX (DECODE (descp, 'ch_miscval', VALUE, NULL)) ch_miscval,
         MAX (DECODE (descp, 'ch_charge', VALUE, NULL)) ch_charge,
         MAX (DECODE (descp, 'order_date', VALUE, NULL)) order_date
    FROM order_desc a, order_t b
   WHERE a.orderid = b.orderid
GROUP BY a.orderid
Output
   ORDERID CH_CODE1   CH_DATE    CH_MISCVAL CH_CHARGE  ORDER_DATE
      1234 5789       10/20/2009 678.9      765                 
      4555 9999       10/0/2009  78.9                            Edited by: new learner on Nov 2, 2010 10:30 AM