我如何使用集合以Magento方式运行该SQL？

Question

This is my SQL:

select created_at from sales_flat_order where created_at > SUBDATE(CURRENT_TIMESTAMP, INTERVAL 3 HOUR); 

This is returning me the orders from the last 3 hours. Now, how would I run that query using Magento collection?

This is what I have so far:

$orderCollection = Mage::getModel('sales/order')->getCollection();

Now I need to add some filter, but I am stuck there. Thanks for helping!

Answer 1

Take a look @ Using Collections in Magento

$orderCollection = Mage::getModel('sales/order')->getCollection();
$orderCollection->addAttributeToFilter('created_at', array(
    'gt' => new Zend_Db_Expr('SUBDATE(CURRENT_TIMESTAMP, INTERVAL 3 HOUR)'))

or

$orderCollection = Mage::getModel('sales/order')->getCollection();
$orderCollection->getSelect()->where('created_at > SUBDATE(CURRENT_TIMESTAMP, INTERVAL 3 HOUR)');

Answer 2

$time = time();
$to = date('Y-m-d H:i:s', $time);
$lastTime = $time - 10800; // 3hr(60min/hr)(60sec/min)
$from = date('Y-m-d H:i:s', $lastTime);
$order =Mage::getModel('sales/order')->getCollection();
    ->addAttributeToSelect('*')
    ->addAttributeToSelect('created_at')
    ->addAttributeToFilter('created_at', array('from' => $from, 'to' => $to))
    ->load();

Let me know if you have any query