// 1. Connect to the database (this example with MySQL)
$host = 'localhost';
$database = 'users';
$user = 'root';
$password = '';
$dsn = "mysql:host=$host;dbname=$database";
$pdo = new PDO($dsn, $user, $password);
// 2. Prepare your query
// 2.1 First way
$query_1 = "SELE...
