Date Math

I've read both Section 8.5 of the on-line 8.2.4 docs, and the pertinent
sections of Douglas & Douglas, and I'm still not certain that I'm correctly
expressing the query I want. Please correct as needed.

From table (Permits) I want to identify those which expire within a
specified time from today. For example:

SELECT permit_nbr, title, date_issued, term,
process_time from Permits
WHERE (date_issued + term YEARS)
< (CURRENT_DATE + process_time MONTHS);

Should I use TODAY rather than CURRENT_DATE? Do I need to cast intervals
explicitly from seconds to days, months, or years?

Rich

--
Richard B. Shepard, Ph.D. | The Environmental Permitting
Applied Ecosystem Services, Inc. | Accelerator(TM)
<http://www.appl-ecosys.com> Voice: 503-667-4517 Fax: 503-667-8863