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如何在MySQL中按DESC或ASC对varchar数字列进行排序？

2024-05-09 12:05:05 411

让我们首先创建一个表-

mysql> create table DemoTable726 (Value varchar(100));

使用插入命令在表中插入一些记录-

mysql> insert into DemoTable726 values('100');
mysql> insert into DemoTable726 values('10');
mysql> insert into DemoTable726 values('110');
mysql> insert into DemoTable726 values('2000');
mysql> insert into DemoTable726 values('1000');

使用select语句显示表中的所有记录-

mysql> select *from DemoTable726;

这将产生以下输出-

+-------+
| Value |
+-------+
| 100   |
| 10    |
| 110   |
| 2000  |
| 1000  |
+-------+
5 rows in set (0.00 sec)

以下是对varchar数字列按升序排序的查询-

mysql> select *from DemoTable726 order by CAST(Value AS DECIMAL(20,2));

这将产生以下输出-

+-------+
| Value |
+-------+
| 10    |
| 100   |
| 110   |
| 1000  |
| 2000  |
+-------+
5 rows in set (0.00 sec)

以下是查询以按降序排序和显示结果-

mysql> select *from DemoTable726 order by CAST(Value AS DECIMAL(20,2)) DESC;

这将产生以下输出-

+-------+
| Value |
+-------+
| 2000  |
| 1000  |
| 110   |
| 100   |
| 10    |
+-------+
5 rows in set (0.00 sec)

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如何在MySQL中按DESC或ASC对varchar数字列进行排序？

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