WHERE age('now',date_effective::datetime)<='3 years'::timespan
I don't know if 'now' in that context is still the authoritative way to
write now, maybe it should be
WHERE age(now(),date_effective::datetime)<='3 years'::timespan
if date_effective is actually a datetime field, which I understand we are
moving to in 7.0 (date fields being non-SQL-standard), then you don't need
the cast, obviously.
----------------------------------------------------------------
Moray.McConnachie@computing-services.oxford.ac.uk
----- Original Message -----
From: "Andrew Perrin - Demography" <aperrin@demog.berkeley.edu>
To: <pgsql-sql@postgresql.org>
Sent: Wednesday, April 12, 2000 6:46 PM
Subject: [SQL] Subtracting from a date
> I need to find all records with a date field (date_effective) 3 years or
> less prior to now(). This clearly must be possible, but I'm not figuring
> it out. Any suggestions?
>
> ---------------------------------------------------------------------
> Andrew J. Perrin - aperrin@demog.berkeley.edu - NT/Unix Admin/Support
> Department of Demography - University of California at Berkeley
> 2232 Piedmont Avenue #2120 - Berkeley, California, 94720-2120 USA
> http://demog.berkeley.edu/~aperrin --------------------------SEIU1199
>
>