added output example of aggregate

manual/codes/DQL (Doctrine Query Language) - SELECT queries - Aggregate values.php

-<?php
-// SELECT u.*, COUNT(p.id) num_posts FROM User u, u.Posts p WHERE u.id = 1 GROUP BY u.id
-
-$query = new Doctrine_Query();
-
-$query->select('u.*, COUNT(p.id) num_posts')
-      ->from('User u, u.Posts p')
-      ->where('u.id = ?', 1)
-      ->groupby('u.id')
-      ->execute();
-?>
+<?php
+// SELECT u.*, COUNT(p.id) num_posts FROM User u, u.Posts p WHERE u.id = 1 GROUP BY u.id
+
+$query = new Doctrine_Query();
+
+$query->select('u.*, COUNT(p.id) num_posts')
+      ->from('User u, u.Posts p')
+      ->where('u.id = ?', 1)
+      ->groupby('u.id')
+      ->execute();
+
+echo $query->Posts[0]->num_posts . ' posts found';
+?>
+