database layer
for PHP

Database Core

Nette Database Core is database abstraction layer and provides core functionality. It is a wrapper around the PDO and provides core functionality.

Database Explorer

Nette Database Explorer significantly simplifies retrieving data from the database without writing SQL queries. It uses efficient queries and does not transmit unnecessary data.

Over 10 Years

We have been developing Nette for over 10 years- and counting! Libraries we provide are therefore highly mature, stable and widely used. They are trusted by a number of global corporations and many significant websites rely on us. Who uses and trusts Nette?


Nette Framework provides a powerful layer for accessing your database easily.

  • composes SQL queries with ease
  • easily fetches data
  • uses efficient queries and does not transmit unnecessary data

The Nette\Database\Connection class is a wrapper around the PDO and represents a connection to the database. The core functionality is provided by Nette\Database\Context. Nette\Database\Table layer provides an enhanced layer for table querying.

Creating a connection

To create a new database connection just create a new instance of Nette\Database\Connection class:

use Nette\Database\Connection;
$connection = new Connection($dsn, $user, $password);

Nette\Database will create own proper internal driver based on your database server. This internal driver adjusts the Nette\Database behavior for your database server. Nette supports this database servers:

Database server DSN name Database support Database\Table support
PostgreSQL pgsql YES YES
Sqlite 3 sqlite YES YES
Sqlite 2 sqlite2 YES
Oracle oci YES

The 4th optional parameter of the connection constructor allows you to specify some options. These options are passed to the PDO constructor and the internal driver constructor, so they can contain a configuration for both the PDO instance and the driver instance.

All connections are created as “lazy” by default. This means the connection is established when it's needed, not when you create a Connection instance. You can disable this behavior by passing 'lazy' => FALSE configuration.

The internal driver class name is detected by provided DSN. However, you can provide you own implementation of an internal driver. To do this, pass your driver name as an option with the driverClass key.

$connection = new Connection($dsn, $user, $password, array(
    'lazy' => FALSE,
    'driverClass' => 'App\YourSpecificDriverImplementationName'

The easiest way to create a connection is to configure one in your application config. NetteExtension allows you create multiple connections. NetteExtension helps you to add database panel to Tracy debug bar.

            dsn:        "mysql:host=;dbname=test"
            user:       "root"
            password:   "password"
            options:    [PDO::MYSQL_ATTR_COMPRESS = true]
            debugger:   true        # debugger bar panel
            explain:    true        # explain queries in debugger bar
            reflection: discovered  # or conventional or classname, default is discovered
            autowired:  true
            dsn: ...
            autowired: false


The core functionality is provided by Nette\Database\Context. Database\Context allows you to easily query your database by calling query method:

use Nette\Database\Context;

$database = new Context($connection);

$database->query('INSERT INTO users', array( // an array can be a parameter
    'name' => 'Jim',
    'created' => new DateTime, // or a DateTime object
    'avatar' => fopen('image.gif', 'r'), // or a file
), ...); // it is even possible to use multiple inserts

$database->query('UPDATE users SET ? WHERE id=?', $data, $id);
$database->query('SELECT * FROM categories WHERE id=?', 123)->dump();