CREATE DATABASE vehicle_system;
USE vehicle_system;
USE vehicle_system; CREATE TABLE IF NOT EXISTS `users` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(250) DEFAULT NULL,
`email` varchar(255) NOT NULL,
`password_hash` text NOT NULL,
`api_key` varchar(32) NOT NULL,
`phone` varchar(14) NOT NULL,
`status` int(1) NOT NULL DEFAULT '1',
`created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
`updated_at` timestamp NOT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `email` (`email`),
UNIQUE KEY `phone` (`phone`)
);
CREATE TABLE IF NOT EXISTS `vehicle_model` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(250) DEFAULT NULL,
`manufacturer_id` int(11) NOT NULL,
`manufacturer_name` varchar(250) NOT NULL,
`model` varchar(32) NOT NULL,
`model_no` varchar(32) NOT NULL,
`type` varchar(32) NOT NULL,
`created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
`updated_at` timestamp NOT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `manufacturer_id` (`manufacturer_id`)
);
CREATE TABLE IF NOT EXISTS `user_vehicles` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(250) DEFAULT NULL,
`user_id` int(11) NOT NULL,
`manufacturer_id` int(11) NOT NULL,
`vehicle_no` varchar(32) NOT NULL,
`rc_no` text,
`engine_type` varchar(32),
`year` int(4),
`insurance_exp_date` timestamp,
`pollution_exp_date` timestamp,
`rc_renew_date` timestamp,
`insurance_company` varchar(32),
`created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
`updated_at` timestamp NOT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `vehicle_no` (`vehicle_no`),
KEY `user_id` (`user_id`),
KEY `manufacturer_id` (`manufacturer_id`)
);
执行上述查询时,我得到了
#1293 - 表定义不正确;在DEFAULT或ON UPDATE子句中只能有一个TIMESTAMP列和CURRENT_TIMESTAMP
但我没有在查询中看到两个默认时间戳,任何人都可以指出可能的错误。是因为users
表中存在当前时间戳吗?如果是这样如何摆脱这个?
答案 0 :(得分:0)
我认为问题是你没有所有timestamp类型字段的默认值。
运行查询我收到以下错误:
Error Code: 1067. Invalid default value for 'updated_at'
然后我得到了:
Error Code: 1067. Invalid default value for 'pollution_exp_date'
当所有时间戳字段都有默认值时,一切正常:
CREATE DATABASE vehicle_system;
USE vehicle_system;
USE vehicle_system; CREATE TABLE IF NOT EXISTS `users` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(250) DEFAULT NULL,
`email` varchar(255) NOT NULL,
`password_hash` text NOT NULL,
`api_key` varchar(32) NOT NULL,
`phone` varchar(14) NOT NULL,
`status` int(1) NOT NULL DEFAULT '1',
`created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
`updated_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
PRIMARY KEY (`id`),
UNIQUE KEY `email` (`email`),
UNIQUE KEY `phone` (`phone`)
);
CREATE TABLE IF NOT EXISTS `vehicle_model` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(250) DEFAULT NULL,
`manufacturer_id` int(11) NOT NULL,
`manufacturer_name` varchar(250) NOT NULL,
`model` varchar(32) NOT NULL,
`model_no` varchar(32) NOT NULL,
`type` varchar(32) NOT NULL,
`created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
`updated_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
PRIMARY KEY (`id`),
UNIQUE KEY `manufacturer_id` (`manufacturer_id`)
);
CREATE TABLE IF NOT EXISTS `user_vehicles` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(250) DEFAULT NULL,
`user_id` int(11) NOT NULL,
`manufacturer_id` int(11) NOT NULL,
`vehicle_no` varchar(32) NOT NULL,
`rc_no` text,
`engine_type` varchar(32),
`year` int(4),
`insurance_exp_date` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
`pollution_exp_date` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
`rc_renew_date` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
`insurance_company` varchar(32),
`created_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
`updated_at` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
PRIMARY KEY (`id`),
UNIQUE KEY `vehicle_no` (`vehicle_no`),
KEY `user_id` (`user_id`),
KEY `manufacturer_id` (`manufacturer_id`)
);
这是在MySql 5.7.10上。
这里有一个有趣的讨论:
https://bugs.mysql.com/bug.php?id=41137
创建时间戳字段与其他字段不同!
实际上高达5.6.6你不必声明NOT NULL,因为根据定义该字段是NOT NULL且既没有DEFAULT也没有ON UPDATE子句,它与DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP相同。
5.6.6之后你必须有明确的默认值。看看:
https://dev.mysql.com/doc/refman/5.5/en/timestamp-initialization.html
和
http://dev.mysql.com/doc/refman/5.7/en/timestamp-initialization.html
最后,在您的情况下,删除NOT NULL是最好的方法。
此致