nabble / ajde

        }

        // FROM

        if (empty($this->from)) {

            // TODO:

            throw new Ajde_Exception('FROM clause can not be empty in query');

        } else {

            $sql .= ' FROM '.implode(', ', $this->from);

        }

        // JOIN

        if (!empty($this->join)) {

        }

        // GROUP BY

        if (!empty($this->groupBy)) {

            $sql .= ' GROUP BY';

            $sql .= ' '.implode(', ', $this->groupBy);

        }

        // HAVING

        if (!empty($this->having)) {