SELECT type, count(id) as count FROM `t_notification` WHERE receiver_id = #{receiverId} AND is_read = 0 GROUP BY type SELECT * FROM `t_notification` WHERE type = #{type} AND sender_id = #{senderId} AND receiver_id = #{receiverId} AND portfolio_id = #{portfolioId} LIMIT 1 UPDATE `t_notification` SET is_read = 0, create_time = #{time}, update_time = #{time}, is_deleted = 0 WHERE id = #{id} UPDATE `t_notification` SET update_time = #{time}, is_deleted = 1 WHERE id = #{id}