On Sat, 27 Aug 2005, Tang Tim Hei wrote:
> Hi,
> I'm new to postgresql. Anytime I type the following command to the
> database to run, it give me no result record if table 'country' is
> empty but can get result if 'country' is not empty. Is this so
> strange?
Not really. You're doing a cartesian join between test.currency and
test.country. If there are no rows in test.country, there are no rows in
the output of the from clause.
> select A.* from test.currency A, test.country B where A.curr_cd='USD'
