mysql订单单号生成器

MySQL订单单号生成器是一种非常有用的工具,它可以帮助您生成唯一的订单单号。当您的在线商店需要处理大量订单时,使用此工具可以确保每个订单都有唯一的标识符,从而避免任何混乱或错误。

mysql订单单号生成器

下面是一个简单的MySQL订单单号生成器的代码示例:

CREATE TABLE `orders` ( `id` int(11) NOT NULL AUTO_INCREMENT, `order_number` varchar(20) NOT NULL, `created_at` datetime NOT NULL, PRIMARY KEY (`id`), UNIQUE KEY `order_number` (`order_number`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8; DELIMITER $$ CREATE TRIGGER `tr_generate_order_number` BEFORE INSERT ON `orders` FOR EACH ROW BEGIN DECLARE prefix CHAR(4); SET prefix = DATE_FORMAT(NOW(), '%Y%m'); SET NEW.order_number = CONCAT(prefix, LPAD((SELECT COUNT(*) FROM orders WHERE DATE_FORMAT(created_at, '%Y%m') = prefix) + 1, 6, '0')); END$$ DELIMITER ;