# Abstract class **Phalcon\Db**[](# "永久链接至标题") Phalcon\Db and its related classes provide a simple SQL database interface for Phalcon Framework. The Phalcon\Db is the basic class you use to connect your PHP application to an RDBMS. There is a different adapter class for each brand of RDBMS. This component is intended to lower level database operations. If you want to interact with databases using higher level of abstraction use Phalcon\Mvc\Model. Phalcon\Db is an abstract class. You only can use it with a database adapter like Phalcon\Db\Adapter\Pdo ~~~ <?php try { $connection = new \Phalcon\Db\Adapter\Pdo\Mysql(array( 'host' => '192.168.0.11', 'username' => 'sigma', 'password' => 'secret', 'dbname' => 'blog', 'port' => '3306', )); $result = $connection->query("SELECT * FROM robots LIMIT 5"); $result->setFetchMode(Phalcon\Db::FETCH_NUM); while ($robot = $result->fetch()) { print_r($robot); } } catch (Phalcon\Db\Exception $e) { echo $e->getMessage(), PHP_EOL; } ~~~ ### Constants[](# "永久链接至标题") *integer***FETCH_LAZY** *integer***FETCH_ASSOC** *integer***FETCH_NAMED** *integer***FETCH_NUM** *integer***FETCH_BOTH** *integer***FETCH_OBJ** *integer***FETCH_BOUND** *integer***FETCH_COLUMN** *integer***FETCH_CLASS** *integer***FETCH_INTO** *integer***FETCH_FUNC** *integer***FETCH_GROUP** *integer***FETCH_UNIQUE** *integer***FETCH_KEY_PAIR** *integer***FETCH_CLASSTYPE** *integer***FETCH_SERIALIZE** *integer***FETCH_PROPS_LATE** ### Methods[](# "永久链接至标题") public static **setup** (*unknown* $options) Enables/disables options in the Database component | - [索引](# "总目录") - [下一页](# "Abstract class Phalcon\Db\Adapter") | - [上一页](# "Class Phalcon\Crypt\Exception") | - [API Indice](#) »