Pl.tell a query for non databsae items values as zero

Question

hai
i have table like this
emp_name     date           hours
xxx          19-12-2007     3
yyy          20-12-2007     4
zzz          23-12-2007     3
i want a query to get the data for 5 days.(ie.19 to 23)
In that the left two days should be placed as zero in the output.
please help me.
thanks

Answer 1

Something like:
SQL> ed
Wrote file afiedt.buf
  1  with t as (select 'xxx' as emp_name, to_date('19-12-2007','dd-mm-yyyy') as dt, 3 as hours from dual union all
  2             select 'yyy', to_date('20-12-2007','dd-mm-yyyy'), 4 from dual union all
  3             select 'zzz', to_date('23-12-2007','dd-mm-yyyy'), 3 from dual)
  4  -- END OF TEST DATA
  5  select t.emp_name, d.dt, nvl(t.hours,0) as hours
  6  from t,
  7       (select to_date('19-12-2007','dd-mm-yyyy')+rownum-1 as dt
  8        from dual connect by rownum <= to_date('23-12-2007','dd-mm-yyyy') - to_date('19-12-2007','dd-mm-yyyy') + 1) d
  9  where d.dt = t.dt(+)
10* order by d.dt
SQL> /
EMP DT                       HOURS
xxx 19/12/2007 00:00:00          3
yyy 20/12/2007 00:00:00          4
    21/12/2007 00:00:00          0
    22/12/2007 00:00:00          0
zzz 23/12/2007 00:00:00          3
SQL>