Re: simple sql question/mlml

actually i was thinking of doing this:
create a 'period' table with 2 columns:
date and period and index on date.
but i will still have to perform this query(which is still a join), do you think its the best way?:

select t.amt, d1.per, d2.per, d3.per, d4.per   from

     transactions t,
     fiscalyear   d1,
     fiscalyear   d2,
     fiscalyear   d3,
     fiscalyear   d4
  where
     t.date1 = d1.datee and
     t.date2 = d2.datee and
     t.date3 = d3.datee and
     t.date4 = d4.datee;

Mike

Michel Lee (ae299_at_FreeNet.Carleton.CA) writes:
> Hi All,
>
> I have this 'newbie' sql question , i hope some has encountered.
> (im pretty sure someone knows the answer)
>
> I have 2 tables.
> 'fiscalyear' defines fiscal periods with date ranges.
> e.g.
> -------------------------------------
> | PER | BEGIN_DATE | END_DATE |
> | 9701 | 10-JAN-97 | 13-FEB-97 |
> | 9702 | 14-FEB-97 | 11-MAR-97 |
> ...
> 'transactions' are transactions with many dates.
> e.g.
> --------------------------------------------
> | AMT | DATE1 | DATE2 | DATE3 | DATE4 |
> ...
>
> How do i display each transaction row with these dates 'converted' to
> their
> fiscal periods?
> my attempt is
>
> select t.amt, d1.per, d2.per, d3.per, d4.per
> from
> transactions t,
> fiscalyear d1,
> fiscalyear d2,
> fiscalyear d3,
> fiscalyear d4
> where
> t.date1 between begin_date and end_date and
> t.date2 between begin_date and end_date and
> t.date3 between begin_date and end_date and
> t.date4 between begin_date and end_date ;
>
>
> but this sounds very inefficient since its count a cartesion product
> with all the joins. (my report runs a very long time)
>
>
> yr help is appreciated.
>
> Mike
>
>
>
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