/**
  * @param string $sWhere
  * @return string
  */
 protected function getAccountByWhere($sWhere)
 {
     $aMap = api_AContainer::DbReadKeys(CTwofactorauth::GetStaticMap());
     $aMap = array_map(array($this, 'escapeColumn'), $aMap);
     $sSql = 'SELECT %s FROM %stwofa_accounts WHERE %s';
     return sprintf($sSql, implode(', ', $aMap), $this->Prefix(), $sWhere);
 }