Re: subselect field "problem" - Mailing list pgsql-general

From Martijn van Oosterhout
Subject Re: subselect field "problem"
Date
Msg-id 20071108205246.GB28495@svana.org
Whole thread Raw
In response to subselect field "problem"  ("Thomas H." <me@alternize.com>)
Responses Re: subselect field "problem"  ("Thomas H." <me@alternize.com>)
List pgsql-general
On Thu, Nov 08, 2007 at 09:35:19PM +0100, Thomas H. wrote:
> i was writing the query below containing a subquery. by mistake, i
> referenced a field from the main table in the subquery, leading to a
> very strange (but working??) result. the planner announced a insanely
> high startup cost, but the query itself finished pretty quickly.

Pick up any SQL book and read up on correlated subqueries.

Have a nice day,
--
Martijn van Oosterhout   <kleptog@svana.org>   http://svana.org/kleptog/
> Those who make peaceful revolution impossible will make violent revolution inevitable.
>  -- John F Kennedy

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