On 4/13/2012 11:39 AM, Mike Blackwell wrote:
Could someone please explain to me why the following select does not
result in a syntax error? (9.0.3)
begin;
create table x( c1 integer , c2 integer);
create table y( c3 integer, c4 integer);
select * from x where c2 in ( select c2 from y where c4 = 2 );
rollback;
Mike
Your subquery is correlated with the outer query. So the c2 in the
subquery is referring to table x.
--
Jack Christensen
ja...@hylesanderson.edu
--
Sent via pgsql-general mailing list (pgsql-general@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-general