Need a function to calcultate value using collections

Question

Hi
I have a main table ab ( sno,empid,joindate,sal_mth, sal_yr ,run_date)
a stage table cd (sno,empid,joindate,sal_mth).
Now the catch is for every run( every day run), I need to get all data from ab and roll fwd them to the run date ( only change would be run_date)
Also If in stage table cd we receive data for the combination sno,empid,joindate,sal_mth which is present in ab, we would
change the sal_yr in ab - criteria would be sal_yr:=sal_yr + cd.sal_mth
I have done it but in primitive way using union etc. Would prefer a function to do this using collection.
Any suggestions?
Regards
SHUBH

Answer 1

Something like below ? (to be turned into function as you didn't mention what to return)
procedure roll_fwd(p_run_date in date) is
begin
  insert into ab
  select a.sno,a.empid,a.joindate,a.sal_mth,a.sal_yr + nvl(c.sal_mth,0) sal_yr,p_run_date
    from ab a,cd c
   where a.run_date = p_run_date - 1
     and a.sno = c.sno(+)
     and a.empid = c.empid(+)
     and a.joindate = c.joindate(+)
     and a.sal_mth = c.sal_mth(+);
end;Regards
Etbin
Edited by: Etbin on 20.2.2011 17:14
No action taken on cd data - if they're lucky, they may get another increase next day ;)