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
jackc@xxxxxxxxxxxxxxxxx
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