mysql增量ID 启动值更改方法

格时加入：

create table table1(id int auto_increment primary key,...)

alter table table1 add id int auto_increment primary key 自增字段。一定要设置为primary key.

创建表格时加入：

CREATE TABLE `orders` (
  `order_num` int(11) NOT NULL auto_increment,
  `order_date` datetime NOT NULL,
  `cust_id` int(11) NOT NULL,
  PRIMARY KEY  (`order_num`),
  KEY `fk_orders_customers` (`cust_id`),
  CONSTRAINT `fk_orders_customers` FOREIGN KEY (`cust_id`) REFERENCES `customers` (`cust_id`) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB AUTO_INCREMENT=10000 DEFAULT CHARSET=utf8;

创建表格后加入：

alter table users AUTO_INCREMENT=10000;

alter table users AUTO_INCREMENT=123456;