magento直接操作数据库

查：

    $read = Mage::getSingleton("core/resource")->getConnection('core_read');

    $sql = "select * from `abc`";    

    $result = $read->fetchAll($sql);  //fetchRow查找一条

增，删，改

    $write = Mage::getSingleton("core/resource")->getConnection('core_write');

     $sql = "insert into abc (name)values('hello')";

     $write->query($sql);

另一种写法：

增

     $write = Mage::getSingleton("core/resource")->getConnection('core_write');

     $table = Mage::getSingleton('core/resource')->getTableName('abc');

     $write->insert($table,array('name'=>'hello'));

改

     $write = Mage::getSingleton("core/resource")->getConnection('core_write');

    $table = Mage::getSingleton('core/resource')->getTableName('abc');

    $write->update($table,array('name'=>'abc'),array('id=?'=>3));

删

        $write = Mage::getSingleton("core/resource")->getConnection('core_write');

    $table = Mage::getSingleton('core/resource')->getTableName('abc');

    $write->delete($table,array('id=?'=>3));

查

     $read = Mage::getSingleton("core/resource")->getConnection('core_read');

    $table = Mage::getSingleton('core/resource')->getTableName('abc');

        $result = $read->select()->from(array('main_table'=>$table))->where('main_table.id=?',3)->limit(1);

        $products=$read->fetchAll($result);

唯一不同的只是一个sql语句是组装的，一个是直接写的