SELECT * FROM t_message status != 2 AND receiver_id = #{params.receiverId} AND sender_id = #{params.senderId} AND type = #{params.type} AND status = #{params.status} AND title LIKE CONCAT('%', #{params.title}, '%') AND priority = #{params.priority} ORDER BY priority DESC, create_time DESC SELECT COUNT(*) FROM t_message WHERE receiver_id = #{receiverId} AND status = 0 SELECT COUNT(*) FROM t_message WHERE receiver_id = #{receiverId} AND status = 0 AND type = #{type} UPDATE t_message SET status = 1, read_time = NOW() WHERE receiver_id = #{receiverId} AND status = 0 AND type = #{type}