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MySQL ORDER BY 关键字


MySQL ORDER BY 关键字

MySQL 的 ORDER BY 关键字用于按升序或降序对结果集进行排序。

ORDER BY 关键字默认按升序对记录进行排序。要按降序对记录进行排序,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

以下是从 Northwind 示例数据库中 "Customers" 表中选择的内容

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;
自己试试 »


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;
自己试试 »

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”和“CustomerName”列排序。这意味着它按 Country 排序,但如果某些行具有相同的 Country,则按 CustomerName 排序

示例

SELECT * FROM Customers
ORDER BY Country, CustomerName;
自己试试 »

ORDER BY 多个列示例 2

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

示例

SELECT * FROM Customers
ORDER BY Country ASC, CustomerName DESC;
自己试试 »

测试自己练习

练习

Customers 表中选择所有记录,按 City 列按字母顺序排序结果。

SELECT * FROM Customers
 ;

开始练习


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