Magento – Write Sql query

Simple step to execute MySQL query in Magento.

(1) Select SQL :

$objCon = Mage::getSingleton('core/resource')->getConnection('core_write');
$result = $objCon->query('SELECT 'entity_id' FROM 'catalog_product_entity');

if(!$result) {
 $rows = $result->fetch(PDO::FETCH_ASSOC);
 if(!$rows) {
    print_r($rows);
 }
}


(2) Insert SQL :

$objCon = Mage::getSingleton('core/resource')->getConnection('core_write');
$objCon->query("insert into table name (fields) values (values) ");

Mage_Cms_Block_Widget_Interface not found

when I was developing Widget of magento in Magento EE version 1.6 . I have spent lot of time behind to fin it out that Mage_Cms_Block_Widget_Interface is not working with Magento EE 1.6 version and got like this "PHP Fatal error: Interface 'Mage_Cms_Block_Widget_Interface' not found."

After I got information about this interface that It moved Mage_Cms_Block_Widget_Interface to Mage_Widget_Block_Interface in Magento EE version 1.6