MySQL 如何按特定顺序排列数据

使用ORDER BY IF()按特定顺序排列数据。以下是语法 −

select *from yourTableName ORDER BY IF(yourColumnName=yourValue1 OR
yourColumnName=yourValue2 OR yourColumnName=yourValue3,yourColumnName,
~yourColumnName) ASC;

首先让我们创建一个表 −

mysql> create table arrangeDataInSpecificOrder
   -> (
   -> StudentId int,
   -> StudentName varchar(20)
   -> );
Query OK, 0 rows affected (0.64 sec)

接下来，使用插入命令插入一些记录到表中，如下所示 −

mysql> insert into arrangeDataInSpecificOrder values(10,'Larry');
Query OK, 1 row affected (0.12 sec)
mysql> insert into arrangeDataInSpecificOrder values(15,'Mike');
Query OK, 1 row affected (0.09 sec)
mysql> insert into arrangeDataInSpecificOrder values(100,'Sam');
Query OK, 1 row affected (0.16 sec)
mysql> insert into arrangeDataInSpecificOrder values(70,'Carol');
Query OK, 1 row affected (0.12 sec)
mysql> insert into arrangeDataInSpecificOrder values(90,'Bob');
Query OK, 1 row affected (0.14 sec)
mysql> insert into arrangeDataInSpecificOrder values(300,'David');
Query OK, 1 row affected (0.12 sec)

接下来，使用select语句显示表中的所有记录，如下所示 −

mysql> select * from arrangeDataInSpecificOrder;

这将产生以下输出 −

+-----------+-------------+
| StudentId | StudentName |
+-----------+-------------+
| 10        | Larry       |
| 15        | Mike        |
| 100       | Sam         |
| 70        | Carol       |
| 90        | Bob         |
| 300       | David       |
+-----------+-------------+
6 rows in set (0.00 sec)

这是按特定顺序排列数据的查询语句 −

mysql> select * from arrangeDataInSpecificOrder ORDER BY IF(StudentId=300 OR
StudentId=100 OR StudentId=10,StudentId, ~StudentId) ASC;

这将产生以下输出 −

+-----------+-------------+
| StudentId | StudentName |
+-----------+-------------+
| 10        | Larry       |
| 100       | Sam         |
| 300       | David       | 
| 90        | Bob         |
| 70        | Carol       |
| 15        | Mike        |
+-----------+-------------+
6 rows in set (0.00 sec)

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