-<!-- $Header: /cvsroot/pgsql/doc/src/sgml/queries.sgml,v 1.1 2001/01/22 23:34:33 petere Exp $ -->
+<!-- $Header: /cvsroot/pgsql/doc/src/sgml/queries.sgml,v 1.2 2001/02/01 19:13:47 momjian Exp $ -->
<chapter id="queries">
<title>Queries</title>
p.name AS "Over 5000",
(sum(s.units) * (p.price - p.cost)) AS "Past Month Profit"
FROM products p LEFT JOIN sales s USING ( pid )
- WHERE p.date > CURRENT_DATE - INTERVAL '4 weeks'
+ WHERE s.date > CURRENT_DATE - INTERVAL '4 weeks'
GROUP BY pid, p.name, p.price, p.cost
HAVING p.price > 5000;
</programlisting>