Cumulative DQL with Doctrine

Answer 1

You just specify the sum in your select part of the DQL:

$query = Doctrine_Query::create()
   ->select('sum(amount)')
   ->from('some_table');

Check out this page in the Doctrine documentation for more info.

Answer 2

Hey, I have check the documentation for Doctrine 1.2, and the way to create the query is (put attention on the alias):

$query = Doctrine_Query::create();
$query->addSelect('AVG(price) as price');
$query->addSelect('AVG(cost) as cost');
// as many addSelect() as you need
$query->from('my_table');

To output the SQL query created:

echo $query->getSqlQuery();

To execute the statement:

$product = $query->fetchOne();

And to access the retrieved data is:

echo $product->getPrice();
echo $product->getCost();

Read the rest of the documentation at Group By Clauses.