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如何在MySQL中按特定顺序排列数据？

2024-04-21 23:28:03 371

使用ORDERBYIF()可以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;

让我们首先创建一个表-

mysql> create table arrangeDataInSpecificOrder
   -> (
   -> StudentId int,
   -> StudentName varchar(20)
   -> );

以下是使用insert命令在表中插入一些记录的查询-

mysql> insert into arrangeDataInSpecificOrder values(10,'Larry');
mysql> insert into arrangeDataInSpecificOrder values(15,'Mike');
mysql> insert into arrangeDataInSpecificOrder values(100,'Sam');
mysql> insert into arrangeDataInSpecificOrder values(70,'Carol');
mysql> insert into arrangeDataInSpecificOrder values(90,'Bob');
mysql> insert into arrangeDataInSpecificOrder values(300,'David');

以下是使用select语句显示表中所有记录的查询-

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-

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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如何在MySQL中按特定顺序排列数据？

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