I wish to return distinct values primarily based on a specific column – ‘company_code’. How do I obtain this? My code is as under.
$question = Drupal::database()->choose('actuarial_bases', 'bases')                     ->fields('bases', ['company_code','basis_id','mortality','commission','initial_expenses','recurring_expenses','date_saved','discount_rate'])                     ->situation('approved_by',!"")                     ->orderBy('date_saved', 'DESC')                     ->distinct(); 


