MySQL 查询显示多个列的排名?
mysqlmysqli database更新于 2025/10/18 13:32:17
为此，使用 FIND_IN_SET() 方法。让我们首先创建一个表 −
mysql> create table DemoTable634 (FirstName varchar(100),Marks int,Age int); Query OK, 0 rows affected (0.69 sec)
使用 insert 命令在表中插入一些记录 −
mysql> insert into DemoTable634 values('John',60,23);
Query OK, 1 row affected (0.16 sec)
mysql> insert into DemoTable634 values('Chris',80,21);
Query OK, 1 row affected (0.23 sec)
mysql> insert into DemoTable634 values('Robert',70,24);
Query OK, 1 row affected (0.22 sec)
使用 select 语句显示表中的所有记录 −
mysql> select *from DemoTable634;
这将产生以下输出 −
+-----------+-------+------+ | FirstName | Marks | Age | +-----------+-------+------+ | John | 60 | 23 | | Chris | 80 | 21 | | Robert | 70 | 24 | +-----------+-------+------+ 3 rows in set (0.00 sec)
以下是显示多个列的排名的查询 −
mysql> SELECT FirstName,Marks,Age, FIND_IN_SET( Marks,( SELECT GROUP_CONCAT( Marks ORDER BY Marks DESC ) FROM DemoTable634)) AS RankOfMarks, FIND_IN_SET(Age,( SELECT GROUP_CONCAT( Age ORDER BY Age DESC ) FROM DemoTable634) ) AS RankOfAge FROM DemoTable634;
这将产生以下输出，显示基于分数和年龄的排名 −
+-----------+-------+------+-------------+-----------+ | FirstName | Marks | Age | RankOfMarks | RankOfAge | +-----------+-------+------+-------------+-----------+ | John | 60 | 23 | 3 | 2 | | Chris | 80 | 21 | 1 | 3 | | Robert | 70 | 24 | 2 | 1 | +-----------+-------+------+-------------+-----------+ 3 rows in set (0.01 sec)
相关文章
有用资源
mysql 参考教程 - 该教程包含有关 mysql 的更多信息:https://www.cainiaomax.com/mysql/
