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获取MySQL中最频繁出现的值的计数？

2024-05-11 04:14:04 392

为此，将聚合函数COUNT()与GROUPBY一起使用。让我们首先创建一个表-

mysql> create table DemoTable
   (
   Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,
   Value int
   );

使用插入命令在表中插入一些记录-

mysql> insert into DemoTable(Value) values(976);
mysql> insert into DemoTable(Value) values(67);
mysql> insert into DemoTable(Value) values(67);
mysql> insert into DemoTable(Value) values(1);
mysql> insert into DemoTable(Value) values(90);
mysql> insert into DemoTable(Value) values(1);
mysql> insert into DemoTable(Value) values(67);
mysql> insert into DemoTable(Value) values(976);
mysql> insert into DemoTable(Value) values(90);
mysql> insert into DemoTable(Value) values(1);
mysql> insert into DemoTable(Value) values(10);

使用select语句显示表中的所有记录-

mysql> select *from DemoTable;

输出结果

+----+-------+
| Id | Value |
+----+-------+
| 1  | 976   |
| 2  | 67    |
| 3  | 67    |
| 4  | 1     |
| 5  | 90    |
| 6  | 1     |
| 7  | 67    |
| 8  | 976   |
| 9  | 90    |
| 10 | 1     |
| 11 | 10    |
+----+-------+
11 rows in set (0.00 sec)

以下是查询以获取MySQL中最频繁出现的值的计数-

mysql> select Value,COUNT(Value) AS ValueFrequency
   from DemoTable group by Value order by ValueFrequency DESC;

输出结果

+-------+----------------+
| Value | ValueFrequency |
+-------+----------------+
| 67    | 3              |
| 1     | 3              |
| 90    | 2              |
| 976   | 2              |
| 10    | 1              |
+-------+----------------+
5 rows in set (0.09 sec)

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获取MySQL中最频繁出现的值的计数？

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