Try SELECT EXTRACT(EPOCH FROM columnname) FROM tablename;
This will give you the number of seconds from 1970-01-01 00:00:00 to the
date/time in your column.
-----Original Message-----
From: mike sears [mailto:matrix@quadrent.net]
Sent: 21 November 2001 02:13
To: pgsql-general@postgresql.org
Subject: [GENERAL] select extract and subqueries
I don't know if its possiable or not but I've been having problems trying to
extract the timestamp out of one of my columns so that I can compare the
dates.
if I do the following it gives me a proper epoch
en=# SELECT EXTRACT(EPOCH FROM TIMESTAMP '2001-11-20');
date_part
------------
1006232400
(1 row)
but if I try to use a subquery to get the date it gives me a parse error.
en=# SELECT EXTRACT (EPOCH FROM TIMESTAMP (select date from master));
ERROR: parser: parse error at or near "select"
is this simply just a limitation of the extract funtion or am I missing
something?
Mike
