Need SQL query - can anyone help

Question

have a table which contains
Name StartDate EndDate Billable NonBillbale
AAA 01-Jan-2007 31-Mar-2007 2 3
AAA 01-Apr-2007 31-Jun-2007 4 6
BBB 01-Jan-2007 31-Mar-2007 2 3
I need to create a table from this table where the entry would be
Name Jan2007Billable Jan2007NonBillable
feb2007Billable Feb2007NonBillable Mar2007Billable Mar2007NonBillable
April2007Billable April2007NonBillable May2007Billable May2007NonBillable Jun2007Billable Jun2007NonBillable
AAA 2 3 2 3 2 3 4 6 4 6 4 6
BBB 2 3 2 3 2 3
I am very new to database programming... It will be highly appreciated if anyone help me to genrate the query

Answer 1

This is called a PIVOT and you can see plenty of examples if you search this forum.
An example would be...
SQL> WITH t AS (select 'AAA' AS cust_name, to_date('01-jan-2007','dd-mon-yyyy') as StartDate, to_date('31-mar-2007','dd-mon-yyyy') EndDate, 2 as Billable, 3 as NonBillable from dual union all
  2             select 'AAA', to_date('01-apr-2007','dd-mon-yyyy'), to_date('30-jun-2007','dd-mon-yyyy'), 4, 6 from dual union all
  3             select 'BBB', to_date('01-jan-2007','dd-mon-yyyy'), to_date('31-mar-2007','dd-mon-yyyy'), 2, 3 from dual)
  4  -- END OF TEST DATA - "CUT HERE" --
  5  select cust_name
  6        ,sum(case when to_date('jan-2007','mon-yyyy') between startdate and enddate then billable else 0 end) as jan2007_b
  7        ,sum(case when to_date('jan-2007','mon-yyyy') between startdate and enddate then nonbillable else 0 end) as jan2007_nb
  8        ,sum(case when to_date('feb-2007','mon-yyyy') between startdate and enddate then billable else 0 end) as feb2007_b
  9        ,sum(case when to_date('feb-2007','mon-yyyy') between startdate and enddate then nonbillable else 0 end) as feb2007_nb
10        ,sum(case when to_date('mar-2007','mon-yyyy') between startdate and enddate then billable else 0 end) as mar2007_b
11        ,sum(case when to_date('mar-2007','mon-yyyy') between startdate and enddate then nonbillable else 0 end) as mar2007_nb
12        ,sum(case when to_date('apr-2007','mon-yyyy') between startdate and enddate then billable else 0 end) as apr2007_b
13        ,sum(case when to_date('apr-2007','mon-yyyy') between startdate and enddate then nonbillable else 0 end) as apr2007_nb
14        ,sum(case when to_date('may-2007','mon-yyyy') between startdate and enddate then billable else 0 end) as may2007_b
15        ,sum(case when to_date('may-2007','mon-yyyy') between startdate and enddate then nonbillable else 0 end) as may2007_nb
16        ,sum(case when to_date('jun-2007','mon-yyyy') between startdate and enddate then billable else 0 end) as jun2007_b
17        ,sum(case when to_date('jun-2007','mon-yyyy') between startdate and enddate then nonbillable else 0 end) as jun2007_nb
18  from t
19  group by cust_name
20  order by 1
21  /
CUS  JAN2007_B JAN2007_NB  FEB2007_B FEB2007_NB  MAR2007_B MAR2007_NB  APR2007_B APR2007_NB  MAY2007_B MAY2007_NB  JUN2007_B JUN2007_NB
AAA          2          3          2          3          2          3          4          6          4          6          4          6
BBB          2          3          2          3          2          3          0          0          0          0          0          0
SQL>