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显示MySQL中某列中重复记录的数量并排序结果

2024-05-13 10:03:04 477

为此，您需要使用GROUPBY作为列名。要获得计数，请使用COUNT（*）并使用ORDERBY对结果进行排序。以下是语法-

select count(*) as anyAliasName from yourTableName group by yourColumnName order By yourAliasName DESC;

让我们首先创建一个表-

mysql> create table DemoTable
(
   Number int
);

使用插入命令在表中插入一些记录-

mysql> insert into DemoTable values(90);
mysql> insert into DemoTable values(100);
mysql> insert into DemoTable values(110);
mysql> insert into DemoTable values(90);
mysql> insert into DemoTable values(100);
mysql> insert into DemoTable values(90);
mysql> insert into DemoTable values(120);
mysql> insert into DemoTable values(100);
mysql> insert into DemoTable values(90);
mysql> insert into DemoTable values(120);

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-

+--------+
| Number |
+--------+
|     90 |
|    100 |
|    110 |
|     90 |
|    100 |
|     90 |
|    120 |
|    100 |
|     90 |
|    120 |
+--------+
10 rows in set (0.00 sec)

以下是查询以显示重复记录的数量并对结果进行排序-

mysql> select count(*) as Occured from DemoTable group by Number order By Occured DESC;

这将产生以下输出-

+---------+
| Occured |
+---------+
|       4 |
|       3 |
|       2 |
|       1 |
+---------+
4 rows in set (0.00 sec)

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显示MySQL中某列中重复记录的数量并排序结果

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