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.
