PHP为队列系统生成票证，并能够在第二天重置票证号

我想使用php创建一个简单的队列系统，当客户选择一个选项时，将在其中生成一张票据。主要要求是：

生成格式为（例如C0001、E0001）的票号，字母表示客户选择的不同选项

能够在第二天重置号码（工作人员单击重置按钮）

每个记录都需要存储在mysql中

下面是我得到的，我得到了两张表（票证id和票证）和一个触发器：

票证id

CREATE TABLE `ticket_id` (`ticket_id` int(5) NOT NULL)
ENGINE=InnoDB DEFAULT CHARSET=latin1;

门票

CREATE TABLE `ticket` (`ticket_id` int(5) NOT NULL, 
`ticket_name` varchar(5) NOT NULL DEFAULT '''0''',
`ticket_type` varchar(25) NOT NULL,
`ticket_time` datetime NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

$query = "INSERT INTO ticket (ticket_type, ticket_time)
          VALUES ('$in_tickettype', NOW())
          ";

$query = "UPDATE ticket SET
          ticket_name = DEFAULT
          WHERE ticket_time = NOW() + INTERVAL 1 DAY
          ";

触发器

CREATE TRIGGER `tg_ticket_insert` BEFORE INSERT ON `ticket`
 FOR EACH ROW BEGIN
  INSERT INTO ticket_id VALUES (NULL);
  SET NEW.ticket_name = CONCAT('A', LPAD(LAST_INSERT_ID(), 4, '0'));
END

newTicket

CREATE TABLE `ticket` (`ticket_id` int(5) NOT NULL, 
`ticket_name` varchar(5) NOT NULL DEFAULT '''0''',
`ticket_type` varchar(25) NOT NULL,
`ticket_time` datetime NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

$query = "INSERT INTO ticket (ticket_type, ticket_time)
          VALUES ('$in_tickettype', NOW())
          ";

$query = "UPDATE ticket SET
          ticket_name = DEFAULT
          WHERE ticket_time = NOW() + INTERVAL 1 DAY
          ";

重置

CREATE TABLE `ticket` (`ticket_id` int(5) NOT NULL, 
`ticket_name` varchar(5) NOT NULL DEFAULT '''0''',
`ticket_type` varchar(25) NOT NULL,
`ticket_time` datetime NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=latin1;

$query = "INSERT INTO ticket (ticket_type, ticket_time)
          VALUES ('$in_tickettype', NOW())
          ";

$query = "UPDATE ticket SET
          ticket_name = DEFAULT
          WHERE ticket_time = NOW() + INTERVAL 1 DAY
          ";

触发器工作正常，因为它成功地生成了数字，但我不知道如何重置数字。无论如何，我知道触发器不是完成整个事情的唯一选择，如果有人有更好的解决方案，请帮助我