Question

我正在使用下面的代码创建7个不同的表（tmp1，tmp2 ... tmp7）。每个acc表都有相同的列和名称，唯一的区别是每个表都在不同的库中（test1，test2 ... test7）。有可能做一些循环，而不是输入7次以下的代码吗？

public class NewWork
{
    public JFrame Frame;
    public JLabel textLabel;
    public JButton readButton, writeButton, printButton;
    public JTextField textField;
    public FileReader reader;
    public FileWriter writer;
    public BufferedReader br;
    public BufferedWriter bw;

    public void PrintFrame()    
    {
        Frame = new JFrame();
        Frame.setSize(500, 300);
        //Frame.pack();
        Frame.setBackground(Color.BLUE);

        textLabel = new JLabel();
        textLabel.setText("Selected File Path:");
        textLabel.setBounds(30, 30, 300, 30);
        textLabel.setVisible(true);

        textField = new JTextField();
        textField.setBounds(30, 70, 300, 30);
        textField.setVisible(true);

        readButton = new JButton();
        readButton.setBounds(350, 70, 100, 30);
        readButton.setText("Select File");
        readButton.setVisible(true);
        readButton.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent e) 
            { 
            JFileChooser FileChooser = new JFileChooser();
            FileChooser.showOpenDialog(null);
            File f= FileChooser.getSelectedFile();
            String path= f.getAbsolutePath();
            try
            {
                reader = new FileReader(path);
                br = new BufferedReader(reader);
                textField.read(br, null);
                br.close();
                textField.requestFocus();
            }
            catch(Exception e1)
            {
                JOptionPane.showMessageDialog(null, e1);
                //  Check Later
                JOptionPane.showMessageDialog(FileChooser, e1);
            }
            }
        });

        writeButton = new JButton();
        writeButton.setBounds(30, 130, 100, 30);
        writeButton.setText("Write");
        writeButton.setVisible(true);
        writeButton.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent e) 
            {
            try
            {
                writer = new FileWriter("E://new.txt");
                bw = new BufferedWriter(writer);
                textField.write(bw);
                bw.close();
                textField.setText("");
                textField.requestFocus();
            }
            catch(Exception e2)
            {
                JOptionPane.showMessageDialog(null, e2);
            }
            }
        });

        printButton = new JButton();
        printButton.setBounds(190, 130, 100, 30);
        printButton.setText("Print Setup");
        printButton.setVisible(true);
        printButton.addActionListener(new ActionListener()
        {
            public void actionPerformed(ActionEvent e) 
            {
            try
            {
                boolean complete = textField.print();
                if(complete)
                {
                    JOptionPane.showMessageDialog(null, "Done Printing!");
                }
                else
                {
                    JOptionPane.showMessageDialog(null, " Printing!");
                }
            }
            catch(Exception e3)
            {
                JOptionPane.showMessageDialog(null, e3);
            }
            }
        });

        Frame.add(textLabel);
        Frame.add(textField);
        Frame.add(readButton);
        //Frame.add(writeButton);
        Frame.add(printButton);
        Frame.setLayout(null);
        Frame.setLocationRelativeTo(null);
        Frame.setVisible(true);
        Frame.setResizable(false);
        //

    }
    public static void main(String[] args)
    {
        NewWork nw = new NewWork();
        nw.PrintFrame();
        //System.out.println("Hi");
    }
}

Answer 1

这可以使用SAS Macro语言完成，该语言专为此类案例而设计。我不会进行大讨论，但以下情况应该有效。公平的警告，我没有测试这个，所以我可能在那里有一个语法错误，但如果没有别的，这应该给你一个完成解决方案的基础。

/ *宏以％macro关键字开头。宏可以采用参数，但在这种情况下不需要参数。特定于宏的命令用＆＃39;％＆＃39;表示。字符。 * /

%macro read_multiple_files;
    %do i = 1 %to 7;
        /* from this point forward, the use of '&i.' will resolve to the
           appropriate loop counter 1-7 */
        proc sql;
            create table tmp&i. as
                select *
                    from test&i..acc
                        where datepart(timestamp) in
                            (select max(datepart(timestamp)) 
                                 from test&i..acc);
        run; quit;
    %end;
%mend read_multiple_files;
/* The '%mend' command doesn't really require the name of the macro to be appended, but I consider it to be good practice to include it */

/* The preceding code defines the macro program.  Now to execute the job, you NEED one last command. */

%read_multiple_files;

我希望这会有所帮助。你会发现宏编程在很多实例中非常有用。这是一篇很好的白皮书。 http://www2.sas.com/proceedings/sugi29/243-29.pdf

SAS创建多个表

1 个答案: