https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Core%21Database%21Query%21Select.php/function/Select%3A%3AgetGroupBy/9
function Select::getGroupBy | Drupal API
functionselectdrupalapi
https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Core%21Database%21Query%21SelectExtender.php/function/SelectExtender%3A%3AgetGroupBy/11.x
function SelectExtender::getGroupBy | Drupal API
functiondrupalapi