id, discuss_id, option_content, create_at, option_url SELECT cado.id, cado.option_content, cado.option_url, ( SELECT count( id ) FROM com_act_discuss_option_user WHERE discuss_option_id = cado.id ) AS num, ( SELECT count( id ) FROM com_act_discuss_option_user WHERE discuss_id = cado.discuss_id ) AS allNum FROM com_act_discuss_option AS cado WHERE discuss_id = #{discussId} ORDER BY num DESC