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MySQL ORDER BY 关键字


MySQL ORDER BY 关键字

ORDER BY 关键字用于按升序或降序对结果集进行排序。

ORDER BY 关键字默认按升序排序记录。要按降序排序记录,请使用 DESC 关键字。

ORDER BY 语法

SELECT column1, column2, ...
FROM table_name
ORDER BY column1, column2, ... ASC|DESC;

演示数据库

以下是 Northwind 示例数据库中“Customers”表的选段

CustomerID CustomerName ContactName Address City PostalCode Country
1

Alfreds Futterkiste Maria Anders Obere Str. 57 Berlin 12209 Germany
2 Ana Trujillo Emparedados y helados Ana Trujillo Avda. de la Constitución 2222 México D.F. 05021 Mexico
3 Antonio Moreno Taquería Antonio Moreno Mataderos 2312 México D.F. 05023 Mexico
4

Around the Horn Thomas Hardy 120 Hanover Sq. London WA1 1DP UK
5 Berglunds snabbköp Christina Berglund Berguvsvägen 8 Luleå S-958 22 Sweden

ORDER BY 示例

以下 SQL 语句从 "Customers" 表中选择所有客户,并按 "Country" 列排序

示例

SELECT * FROM Customers
ORDER BY Country;
自己动手试一试 »


ORDER BY DESC 示例

以下 SQL 语句从 "Customers" 表中选择所有客户,并按 "Country" 列降序排序

示例

SELECT * FROM Customers
ORDER BY Country DESC;
自己动手试一试 »

ORDER BY 多个列示例

以下 SQL 语句从 "Customers" 表中选择所有客户,并按 "Country" 列和 "CustomerName" 列排序。这意味着它首先按 Country 排序,然后如果某些行具有相同的 Country,它将按 CustomerName 排序。

示例

SELECT * FROM Customers
ORDER BY Country, CustomerName;
自己动手试一试 »

ORDER BY 多个列示例 2

以下 SQL 语句从 "Customers" 表中选择所有客户,按 "Country" 列升序排序,按 "CustomerName" 列降序排序

示例

SELECT * FROM Customers
ORDER BY Country ASC, CustomerName DESC;
自己动手试一试 »

通过练习来测试自己

练习

Customers 表中选择所有记录,按 City 列按字母顺序对结果进行排序。

SELECT * FROM Customers
 ;

开始练习


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