Question

查询按照从某个值开始的值对表进行排序。

电流：

ZQE123
ABC123
ABC324
ALP234

如果我从变量'ABC324'

订购

ABC324
ALP234
ZQE123
ABC123

如果我从变量'ZZZ123'

订购

ABC123
ABC324
ALP234
ZQE123

它基本上是一个有序的循环列表，具体取决于指定的变量。

我尝试过使用RANK()功能，但没有太多运气。

SELECT 
    Location, 
    RANK() OVER (ORDER BY Location) 
FROM Table1

输出：

ZQE123    4 
ABC123    1
ABC324    2 
ALP234    3

如何根据当前位置进行操作？

Answer 1

public class TblManagement extends JInternalFrame {


JList<String> lastListSelected = null;
    .
    .

    public TblManagement(JDesktopPane desk) {

    MouseInputAdapter listMouseHandler = new ListMouseHandler();

    // create JLists.
    columnslist[i].addMouseListener(listMouseHandler);

    }

    private class ListMouseHandler extends MouseInputAdapter {

    public void mouseClicked(MouseEvent e) {

        JList<String> currentListSelected = (JList<String>) e.getSource();

        int selectedIndex = currentListSelected.getSelectedIndex();
        String selectedValue = currentListSelected.getModel().getElementAt(selectedIndex);

        //System.out.println(selectedValue);

        clearSelections(mainPanel, currentListSelected, lastListSelected);
        lastListSelected = currentListSelected;
        System.out.println(lastListSelected.getModel().getElementAt(0));

    }
}

        void clearSelections(Container container, JList currentListSelected, JList lastListSelected) {

    for (Component c : container.getComponents()) {
        if (c instanceof JList) {
            if ( c != lastListSelected && c != currentListSelected) {
             System.out.println("JList found");
             ((JList) c).clearSelection();

            }
        }

        else
            if (c instanceof Container) {
               clearSelections((Container)c, currentListSelected, lastListSelected);
            }
    }
}

将是一种方式。或另一个（假设没有空值）

ORDER  BY CASE
            WHEN YourCol >= @Variable THEN 0
            ELSE 1
          END,
          YourCol

Answer 2

只是另一种选择，虽然我喜欢 Martin Smith 的回答：

DECLARE @Start CHAR(6) = 'ABC324';

DECLARE @T TABLE (Val CHAR(6));
INSERT INTO @T VALUES ('ZQE123'), ('ABC123'), ('ABC324'), ('ALP234');

DECLARE @Count INT;
SELECT @Count = COUNT(1) FROM @T;


;WITH Ranked AS
(
    SELECT *, RANK() OVER (ORDER BY Val) Ord FROM @T
)
SELECT Val FROM Ranked
ORDER BY CASE WHEN Val >= @Start THEN Ord ELSE Ord + @Count END;

SQL Server：如何使用起始值进行排序

2 个答案: