SQL LAST() 函数

　LAST() 函数返回指定的列中最后一个记录的值。

SQL LAST() 语法

SELECT LAST(column_name) FROM table_name;

注释：只有 MS Access 支持 LAST() 函数。


SQL Server、MySQL 和 Oracle 中的 SQL LAST() 工作区

SQL Server 语法

SELECT TOP 1 column_name
FROM table_name
ORDER BY column_name DESC;

实例

SELECT TOP 1 CustomerName FROM Customers               
ORDER BY CustomerID DESC;

MySQL 语法

SELECT column_name FROM table_name                
ORDER BY column_name DESC                
LIMIT 1;

实例

SELECT CustomerName FROM Customers                
ORDER BY CustomerID DESC                
LIMIT 1;

Oracle 语法

SELECT column_name FROM table_name               
ORDER BY column_name DESC                
WHERE ROWNUM <=1;

实例

SELECT CustomerName FROM Customers                
ORDER BY CustomerID DESC                
WHERE ROWNUM <=1;

演示数据库

　在本教程中，我们将使用众所周知的 Northwind 样本数据库。

　下面是选自 "Customers" 表的数据：

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

SQL LAST() Example

　下面的 SQL 语句选取 "Customers" 表的 "CustomerName" 列中最后一个记录的值：

实例

SELECT LAST(CustomerName) AS LastCustomer FROM Customers;