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MySQL中两列之间的排序差异？

2024-05-16 07:08:13 399

为此使用ORDERBY子句。让我们首先创建一个表-

mysql> create table DemoTable
   (
   Value1 int,
   Value2 int
   );

使用插入命令在表中插入一些记录-

mysql> insert into DemoTable values(10,40);
mysql> insert into DemoTable values(50,5);
mysql> insert into DemoTable values(51,56);
mysql> insert into DemoTable values(52,78);
mysql> insert into DemoTable values(90,7);

使用select语句显示表中的所有记录-

mysql> select *from DemoTable;

输出结果

+--------+--------+
| Value1 | Value2 |
+--------+--------+
| 10     | 40     |
| 50     | 5      |
| 51     | 56     |
| 52     | 78     |
| 90     | 7      |
+--------+--------+
5 rows in set (0.00 sec)

以下是获取两列之间的排序差异的查询-

mysql> select (Value1-Value2) as Sub from DemoTable order by Sub DESC;

输出结果

+------+
| Sub  |
+------+
| 83   |
| 45   |
| -5   |
| -26  |
| -30  |
+------+
5 rows in set (0.00 sec)

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MySQL中两列之间的排序差异？

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