SQL LAST() 函数
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;
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