MySQL根据模数结果查询ORDER BY记录
为此，将ORDERBY与模运算符一起使用。让我们首先创建一个表-
mysql> create table DemoTable ( StudentId int, StudentName varchar(100) );
使用插入命令在表中插入一些记录-
mysql> insert into DemoTable values(100,'Chris'); mysql> insert into DemoTable values(101,'Robert'); mysql> insert into DemoTable values(102,'David'); mysql> insert into DemoTable values(103,'Mike');
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)
这是按模数排序的查询-
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)
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