奈寻味导航网 » 文章资讯 » 在单个MySQL查询中按两列的函数排序

在单个MySQL查询中按两列的函数排序

2024-04-23 16:26:03 363

让我们先创建一个表

mysql> create table orderByAFunctionDemo
   -> (
   -> Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,
   -> FirstNumber int,
   -> SecodNumber int
   -> );

使用insert命令在表中插入一些记录。查询如下-

mysql> insert into orderByAFunctionDemo(FirstNumber,SecodNumber) values(10,4);
mysql> insert into orderByAFunctionDemo(FirstNumber,SecodNumber) values(45,78);
mysql> insert into orderByAFunctionDemo(FirstNumber,SecodNumber) values(23,10);
mysql> insert into orderByAFunctionDemo(FirstNumber,SecodNumber) values(67,237);
mysql> insert into orderByAFunctionDemo(FirstNumber,SecodNumber) values(12,90);

使用select语句显示表中的所有记录。查询如下-

mysql> select *from orderByAFunctionDemo;

以下是输出

+----+-------------+-------------+
| Id | FirstNumber | SecondNumber|
+----+-------------+-------------+
|  1 |          10 |           4 |
|  2 |          45 |          78 |
|  3 |          23 |          10 |
|  4 |          67 |         237 |
|  5 |          12 |          90 |
+----+-------------+-------------+
5 rows in set (0.00 sec)

这是按两列函数排序的查询。查询如下-

mysql> select (4*FirstNumber+5*SecondNumber) as Calculation
   -> from orderByAFunctionDemo
   -> order by Calculation desc;

以下是输出

+-------------+
| Calculation |
+-------------+
|        1453 |
|         570 |
|         498 |
|         142 |
|          60 |
+-------------+
5 rows in set (0.00 sec)

返回顶部
3162201930
czq8825@qq.com

在单个MySQL查询中按两列的函数排序

热门推荐

随机推荐