const [rows] = await connection.execute(
  'SELECT * FROM users WHERE username = ? AND password = ?',
  [username, password]
);

cursor.execute(
    "SELECT * FROM users WHERE username = %s AND password = %s",
    (username, password)
)

PreparedStatement ps = conn.prepareStatement(
    "SELECT * FROM users WHERE username = ? AND password = ?"
);
ps.setString(1, username);
ps.setString(2, password);
ResultSet rs = ps.executeQuery();

using var cmd = new SqlCommand(
    "SELECT * FROM users WHERE username = @user AND password = @pass",
    connection
);
cmd.Parameters.AddWithValue("@user", username);
cmd.Parameters.AddWithValue("@pass", password);

$stmt = $pdo->prepare(
    'SELECT * FROM users WHERE username = :user AND password = :pass'
);
$stmt->execute(['user' => $username, 'pass' => $password]);