Magento的Models 和Collection  很强大，使用它们可以很方便的查询和操作数据库。但是有些场合，因为一些特殊需求或对Magento的了解不够深，可能会需要自己手写SQL语句来查询和操作数据库。以下分别是读写数据库的代码。

// For Read // fetch read database connection that is used in Mage_Core module $read= Mage::getSingleton('core/resource')->getConnection('core_read'); $value=$read->query("SE..."); $row = $value->fetch(); print_r($row); // As Array  

   // For Write // fetch write database connection that is used in Mage_Core module $write = Mage::getSingleton('core/resource')->getConnection('core_write'); // now $write is an instance of Zend_Db_Adapter_Abstract $write->query("insert into tablename values ('aaa','bbb','ccc')");