MySQL 查询：使用取模结果对记录排序

为此，请将 ORDER BY 与取模运算符一起使用。让我们首先创建一个表−

mysql> create table DemoTable
(
   StudentId int,
   StudentName varchar(100)
);
Query OK, 0 rows affected (1.88 sec)

使用 insert 命令将一些记录插入表中−

mysql> insert into DemoTable values(100,'Chris');
Query OK, 1 row affected (0.41 sec)
mysql> insert into DemoTable values(101,'Robert');
Query OK, 1 row affected (0.30 sec)
mysql> insert into DemoTable values(102,'David');
Query OK, 1 row affected (0.94 sec)
mysql> insert into DemoTable values(103,'Mike');
Query OK, 1 row affected (0.23 sec)

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−

+-----------+-------------+
| StudentId | StudentName |
+-----------+-------------+
|       100 | Chris       |
|       101 | Robert      |
|       102 | David       |
|       103 | Mike        |
+-----------+-------------+
4 rows in set (0.00 sec)

以下是带有取模运算符的排序查询−

mysql> select StudentId,StudentName,StudentId % 2,StudentId % 3 from DemoTable order by StudentId % 2,StudentId % 3;

这将产生以下输出−

+-----------+-------------+---------------+---------------+
| StudentId | StudentName | StudentId % 2 | StudentId % 3 |
+-----------+-------------+---------------+---------------+
|       102 | David       |             0 |             0 |
|       100 | Chris       |             0 |             1 |
|       103 | Mike        |             1 |             1 |
|       101 | Robert      |             1 |             2 |
+-----------+-------------+---------------+---------------+
4 rows in set (0.00 sec)

更新日期： 30-Sep-2019

117 浏览

开启您的职业 生涯

通过完成课程获得认证

开始
广告