创建默认为 0000-00-00 的 MySQL 日期时间列?
mysqlmysqli database更新于 2024/1/30 17:50:00
要设置默认值，您可以在 MySQL 中使用 DEFAULT 关键字。让我们首先创建一个表 −
mysql> create table DemoTable -> ( -> EmployeeId int NOT NULL AUTO_INCREMENT PRIMARY KEY, -> EmployeeName varchar(20), -> EmployeeJoiningDate datetime default '0000-00-00 00:00:00' -> )ENGINE=MyISAM,AUTO_INCREMENT=100; Query OK, 0 rows affected (0.21 sec)
使用 insert 命令在表中插入一些记录 −
mysql> insert into DemoTable(EmployeeName) values('Chris');
Query OK, 1 row affected (0.13 sec)
mysql> insert into DemoTable(EmployeeName) values('David');
Query OK, 1 row affected (0.04 sec)
mysql> insert into DemoTable(EmployeeName) values('Mike');
Query OK, 1 row affected (0.03 sec)
mysql> insert into DemoTable(EmployeeName) values('Sam');
Query OK, 1 row affected (0.06 sec)
使用 select 语句显示表中的所有记录 −
mysql> select *from DemoTable;
这将产生以下输出 −
+------------+--------------+---------------------+ | EmployeeId | EmployeeName | EmployeeJoiningDate | +------------+--------------+---------------------+ | 100 | Chris | 0000-00-00 00:00:00 | | 101 | David | 0000-00-00 00:00:00 | | 102 | Mike | 0000-00-00 00:00:00 | | 103 | Sam | 0000-00-00 00:00:00 | +------------+--------------+---------------------+ 4 rows in set (0.00 sec)
