Question

我有一张这样的桌子：

Employee    Month       ActDate
Emp 1       Feb     10/02/2019
Emp 1       Feb     15/02/2019
Emp 1       Mar     10/03/2019
Emp 2       Mar     09/03/2019
Emp 2       Apr     04/04/2019
Emp 2       Apr     05/04/2019
Emp 3       Feb     03/02/2019
Emp 4       Feb     06/02/2019

我需要使它看起来像这样

Employee    Feb                         Mar            Apr
Emp 1       10/02/2019  -  15/02/2019   10/03/2019  
Emp 2                                   09/03/2019     04/04/2019  -  05/04/2019
Emp 3       03/02/2019      
Emp 4       06/02/2019

我可以解决这个问题，但是例如Emp2在2月会有2行，我需要将同一位员工的所有行连接起来，我该如何实现呢？

使用SQL Server 2008

谢谢

Answer 1

这是带有某些条件逻辑的聚合。这可能是最简单的两种聚合级别：

  public sealed partial class MainPage : Page
  {
    public MainPage()
    {
      this.InitializeComponent();

      this.RequiresPointer = RequiresPointer.Never;
      Application.Current.RequiresPointerMode = ApplicationRequiresPointerMode.WhenRequested;

      bool res = daWebView.Focus(FocusState.Unfocused);

      daWebView.GettingFocus += DaWebView_GettingFocus;
      daWebView.PointerMoved += DaWebView_PointerMoved;

      Uri uri = new Uri("ms-appx-web:///index.html");
      daWebView.Source = uri;
    }

    private void DaWebView_PointerMoved(object sender, PointerRoutedEventArgs e)
    {
      // never happens.
      Debug.WriteLine("pointer moved");
    }

    private void DaWebView_GettingFocus(UIElement sender, GettingFocusEventArgs args)
    {
      // not working, it still gets focus and receive mouse movement.
      args.Cancel = true;
    }
  }

如何在枢轴列中合并多行

1 个答案: