在MySQL查询中向列添加用户定义值
mysql> create table DemoTable1847
(
GameStatus ENUM('PENDING','COMPLETED','CANCELLED')
);
Query OK, 0 rows affected (0.00 sec)使用Insert命令在表中插入一些记录
mysql> insert into DemoTable1847 values('PENDING');
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1847 values('COMPLETED');
Query OK, 1 row affected (0.00 sec)
mysql> insert into DemoTable1847 values('CANCELLED');
Query OK, 1 row affected (0.00 sec)使用select语句显示表中的所有记录
mysql> select * from DemoTable1847;
+------------+ | GameStatus | +------------+ | PENDING | | COMPLETED | | CANCELLED | +------------+ 3 rows in set (0.00 sec)
下面是在MySQL查询中向列添加用户定义值的查询
mysql> select * from DemoTable1847
union all
select 'REFUND';+------------+ | GameStatus | +------------+ | PENDING | | COMPLETED | | CANCELLED | | REFUND | +------------+ 4 rows in set (0.00 sec)