Thank you very much - looks like I will have to prefix all cols.
Regards
AK
On Tue, May 12, 2015 at 3:05 AM, Victor Yegorov <vyegorov@xxxxxxxxx> wrote:
2015-05-11 19:26 GMT+03:00 Anil Menon <gakmenon@xxxxxxxxx>:manualscan=> select count(*) From public.msgtxt where msgid in (select msgid From ver736.courier where org_id=3);
count
-------
10225
(1 row)Please note, there is no msgid col in courier table. Which brings the question why does this SQL work? An "select msgid From courier where org_id=3" by itself gives error column "msgid" does not exist.
Because you can reference both, inner and outer columns from the inner query.Here you're most likely referring to the outer `msgid` in the subquery.That's why it is always a good idea to prefix all your columns with tables aliases.--Victor Y. Yegorov
