UPDATE t_message SET read_flag = #{readFlag}, read_time = now() WHERE message_id = #{messageId} AND receiver_user_type = #{receiverUserType} AND receiver_user_id = #{receiverUserId} AND read_flag != #{readFlag} SELECT * FROM t_message AND receiver_user_type = #{query.receiverUserType} AND receiver_user_id = #{query.receiverUserId} AND message_type = #{query.messageType} AND ( INSTR(title,#{query.searchWord}) OR INSTR(content,#{query.searchWord}) ) AND read_flag = #{query.readFlag} AND DATE_FORMAT(create_time, '%Y-%m-%d') >= DATE_FORMAT(#{query.startDate}, '%Y-%m-%d') AND DATE_FORMAT(create_time, '%Y-%m-%d') <= DATE_FORMAT(#{query.endDate}, '%Y-%m-%d') ORDER BY message_id DESC SELECT count(1) FROM t_message where receiver_user_type = #{receiverUserType} AND receiver_user_id = #{receiverUserId} AND read_flag = false