SELECT
                ur.user_id,
                ur.center_id,
                IF(s.gender = 1, 'm', 'f') AS gender,
                s.stage_number,
                s.agestart,
                s.ageend
            FROM user_results__2020 ur
                INNER JOIN users u ON ur.user_id = u.oId
                INNER JOIN stages s ON TIMESTAMPDIFF(YEAR, u.birthday, ur.start) BETWEEN s.agestart AND s.ageend
                    AND s.gender = u.gender
                    AND ur.start >= s.stagestart
                    AND ur.start < s.stageend
                    AND ((u.special_group IS NULL AND s.special_group IS NULL) OR u.special_group = s.special_group)
            WHERE
                ur.start BETWEEN STR_TO_DATE(:dateStart, '%d.%m.%Y') AND STR_TO_DATE(:dateEnd, '%d.%m.%Y')
                AND ur.status = 1
                AND IFNULL(ur.result, '') <> ''
                AND NOT EXISTS (
                    SELECT 1 FROM tmp_unique_user_center uuc
                    WHERE uuc.user_id = ur.user_id
                        AND uuc.center_id = ur.center_id
                )
            GROUP BY ur.user_id, ur.center_id, s.stage_number