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获取MySQL中不同类型的用户数量？

2024-04-23 11:33:03 466

让我们首先创建一个表-

mysql> create table DemoTable
   -> (
   -> UserName varchar(20),
   -> UserType ENUM('New User','Registered User')
   -> );

使用插入命令在表中插入一些记录-

mysql> insert into DemoTable values('Chris','New User');
mysql> insert into DemoTable values('David','New User');
mysql> insert into DemoTable values('Mike','Registered User');
mysql> insert into DemoTable values('Sam','New User');

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-

+----------+-----------------+
| UserName | UserType        |
+----------+-----------------+
| Chris    | New User        |
| David    | New User        |
| Mike     | Registered User |
| Sam      | New User        |
+----------+-----------------+
4 rows in set (0.00 sec)

这是获取不同类型用户数量的查询-

mysql> select count(*),UserType from DemoTable group by UserType;

+----------+-----------------+
| count(*) | UserType        |
+----------+-----------------+
|        3 | New User        |
|        1 | Registered User |
+----------+-----------------+
2 rows in set (0.00 sec)

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获取MySQL中不同类型的用户数量？

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