Java 更新我的表时出错

更新takenOutTbl中的记录时出错（只有少数记录）。任何帮助都将不胜感激。这是更新代码：

fine = overdueDays * 10; //the fine is calculated by multiplying the number of overdue days by the 10
            simpleUpdate("update takenOutTbl set Random Calculations = Random Calculations " + fine);

它与此方法相连接：

public static void simpleUpdate(String update) throws SQLException {
    try {
        Connection connection = dc.DatabaseConnection(); //a connection to the database is established
        PreparedStatement statement = connection.prepareStatement(update); //the conenction is used to prepare the update statement which was sent to this method
        statement.executeUpdate();//the statement is executed
        statement.close(); //the prepared statement is closed
    } catch (SQLException e) {
        JOptionPane.showMessageDialog(null, "Error: the database was not updated. Please try again." );
        System.err.print(e.getMessage());
    }
}     

我收到的错误消息是：

user lacks privilege or object not found: RANDOM

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请按以下方式更正您的查询：

"update takenOutTbl set [Random Calculations] = [Random Calculations] + " + fine

由于列名中有空格，您必须稍微帮助MS Access，并指出

随机计算

是一列。可以通过将列名括在括号中来实现这一点

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另外，您的查询在末尾缺少一个

+

，因此我在上面的示例中也添加了这个问题。

错误消息应该给出问题的答案。它试图使用“随机”作为标识符，而不是“随机计算”。谢谢，但如果我这样做，我现在会收到此错误：“意外令牌：40”您已将

+

添加到查询的末尾，对吗？