Java 如何在Eclipse中正确使用Select Max（）

我正在做一个学校项目，我必须与access数据库进行交互。我正试图

SELECT Max(GameID) AS MaxID
FROM Games

但是，当通过我构建的Eclipse应用程序运行此查询时，只会在控制台中返回

SQL Exception: UCAExc:::4.0.3 Column not found: GameID
SQL State: S1000
Vendor Error: -421

我已经检查了access数据库，该列肯定存在。我在access数据库中运行了查询，它也在那里工作。我不确定我错过了什么或者这是否可能。如何获取gameID的最高值

这是到数据库的连接

ResultSet rs = null; //will hold record that get returned
Statement stmt = null; //will hold the SQL statement we want to run

try
{
    //2. Establish the connection
    Connection conn = DriverManager.getConnection("jdbc:ucanaccess://C:/Users/Public/ZaccaroBlottoDB.accdb");

    //3. Create the statement
    stmt = conn.createStatement();
    String theQuery = "SELECT Max(" 
            + "GameID)"
            + " As MaxID"
            + " FROM Games"
            + " WHERE (1=1)";

    //4. Execute the statement
    rs = stmt.executeQuery(theQuery);

    //5. Process the results
    while (rs.next())
    {
        int gameID = rs.getInt("GameID"); //note the type and the field name from the DB


        System.out.println(gameID);
        //addGameIDFTF.setText(Integer.toString(gameID +1));
    }//while

    //6. Close the Connection
    rs.close();
    conn.close();           
} 
catch (SQLException ex)
{
    System.out.println("SQL Exception: " + ex.getMessage());
    System.out.println("SQL State: " + ex.getSQLState());
    System.out.println("Vendor Error: " + ex.getErrorCode());
    ex.printStackTrace();
} //catch

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我认为问题在于您正在检索的值。正如您提到的别名MaxID，您应该从result_set而不是GameID获取MaxID

因此，它应该是

int gameID = rs.getInt("MaxID"); 

而不是

int gameID = rs.getInt("GameID"); 

---

哪一行给出了错误

rs=stmt.executeQuery（查询）

或

intgameid=rs.getInt（“gameID”）

？