标签：insert ble pre var innodb inno 插入 null mys
测试表：
CREATE TABLE `test` ( `id` int(11) NOT NULL AUTO_INCREMENT, `name` varchar(255) NOT NULL, `order`varchar(255)DEFAULT NULL,
PRIMARY KEY (`id`) ) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8;
插入测试数据：
INSERT INTO `bbkb_busticket`.`test` (`id`, `name`, `order`) VALUES (‘1‘, ‘张三‘, ‘0‘); INSERT INTO `bbkb_busticket`.`test` (`id`, `name`, `order`) VALUES (‘2‘, ‘李四‘, ‘1‘); INSERT INTO `bbkb_busticket`.`test` (`id`, `name`, `order`) VALUES (‘3‘, ‘王八蛋‘, ‘2‘);
交换两行中某个字段的值：（将ID=1、2的两个order替换下）
UPDATE test t1 JOIN test t2 ON (t1.id =2 AND t2.id = 1) SET t1.`order` = t2.`order`,t2.`order`=t1.`order`;
交换两列中某两列的值：（将ID=1的name 和 order 交换一下）
UPDATE test t1,test t2 SET t1.`name` = t2.`order`,t1.`order` = t2.`name` WHERE t1.id = t2.id
标签：insert ble pre var innodb inno 插入 null mys
原文地址：https://www.cnblogs.com/foreverYoungCoder/p/9449312.html
