MySQL 查詢：使用取模結果對記錄排序

為此，請將 ORDER BY 與取模運算子一起使用。讓我們首先建立一個表−

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

使用 insert 命令將一些記錄插入表中−

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 語句顯示錶中的所有記錄−

mysql> select *from DemoTable;

這將產生以下輸出−

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

以下是帶有取模運算子的排序查詢−

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

這將產生以下輸出−

+-----------+-------------+---------------+---------------+
| 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

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