微客导航 » 文章资讯 » 选择在MySQL中设置为ENUM的具有ACTIVE状态的记录

选择在MySQL中设置为ENUM的具有ACTIVE状态的记录

2024-04-22 22:06:03 321

让我们首先创建一个表。在这里，我们使用ENUM设置状态-

mysql> create table DemoTable2037
   -> (
   -> StudentId int,
   -> status enum('Active','Inactive')
   -> );

使用插入命令在表中插入一些记录-

mysql> insert into DemoTable2037 values(99,'Active');

mysql> insert into DemoTable2037 values(99,'Inactive');

mysql> insert into DemoTable2037 values(100,'Inactive');

mysql> insert into DemoTable2037 values(99,'Active');

mysql> insert into DemoTable2037 values(100,'Inactive');

mysql> insert into DemoTable2037 values(101,'Active');

mysql> insert into DemoTable2037 values(101,'Active');

使用select语句显示表中的所有记录-

mysql> select *from DemoTable2037;

这将产生以下输出-

+-----------+----------+
| StudentId | status   |
+-----------+----------+
| 99        | Active   |
| 99        | Inactive |
| 100       | Inactive |
| 99        | Active   |
| 100       | Inactive |
| 101       | Active   |
| 101       | Active   |
+-----------+----------+
7 rows in set (0.00 sec)

这是查询以选择具有活动状态的记录-

mysql> select StudentId,status
   -> from DemoTable2037 where status='Active'
   -> group by StudentId;

这将产生以下输出-

+-----------+--------+
| StudentId | status |
+-----------+--------+
| 99        | Active |
| 101       | Active |
+-----------+--------+
2 rows in set (0.00 sec)

返回顶部
3162201930
czq8825@qq.com

选择在MySQL中设置为ENUM的具有ACTIVE状态的记录

热门推荐

随机推荐