创建更新字段时添加 ON UPDATE CURRENT_TIMESTAMP
CREATE TABLE `emp` ( `id` INT(11) DEFAULT NULL, `name` VARCHAR(100) DEFAULT NULL, `deg` VARCHAR(100) DEFAULT NULL, `salary` INT(11) DEFAULT NULL, `dept` VARCHAR(10) DEFAULT NULL, `create_time` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP, `update_time` TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, `is_delete` BIGINT(20) DEFAULT '1' ) ENGINE=INNODB DEFAULT CHARSET=latin1;
