How To? Select List item return 2 values (high and a low)

Question

Can anyone suggest how to make a select list drop box return 2 values for my query.
eg:
Pick from
Last Week
Last Month
Last Year
return high/lo values of
5-feb-06 12-feb-06
01-jan-06 31-jan-06
01-jan-05 31-dec-06
Such that my query can refer to it as
select *
from tabx
where dte > :parm_lo
and dte < :parm_hi
You get the idea ..

Answer 1

I haven't tested this at all, so it may not work, but the first thing that springs to mind is not returning the two dates, base it on the current date, i.e. have your select list return something like -
Last Week - Return 'W'
Last Month - Return 'M'
Last Year - Return 'Y'
then use a query something like -
SELECT *
  FROM tabx
WHERE dte >
          CASE v ('ITEM')
             WHEN 'W'
                THEN TRUNC (SYSDATE, 'd')
             WHEN 'M'
                THEN TRUNC (SYSDATE, 'Mon')
             WHEN 'Y'
                THEN TRUNC (SYSDATE, 'yyyy')
             ELSE dte - 1
          ENDLike I said, completely untested and may not work...you may also have to play around with the boundary values (NLS settings too perhaps).