N98\Magento\Command\Database\QueryCommand::configure PHP Method

    protected function configure()
    {
        $this->setName('db:query')->addArgument('query', InputArgument::OPTIONAL, 'SQL query')->addOption('only-command', null, InputOption::VALUE_NONE, 'Print only mysql command. Do not execute')->setDescription('Executes an SQL query on the database defined in local.xml');
        $help = <<<HELP
Executes an SQL query on the current configured database. Wrap your SQL in
single or double quotes.

If your query produces a result (e.g. a SELECT statement), the output of the
mysql cli tool will be returned.

* Requires MySQL CLI tools installed on your system.

HELP;
        $this->setHelp($help);
    }