Question

我希望两个房间的两个日期之间的结果可用房间。

我的查询

 CREATE TABLE AccountTable
 (
     RowID int IDENTITY(1, 1),
     AccountID varchar(2),
     AccountName varchar(50),
     SeqNum int,
     SeqDate datetime
 )  



   public class dbvalue
   {
      public int db_value { get;set; }
   }

        //OnClick Method
        cmd.CommandText ="SELECT SeqNum FROM AccountTable;";
        int i = Int32.Parse(amount.Text);
        SqlDataReader sdr = cmd.ExecuteReader();

         while (sdr.Read())
        {
             int k(int)sdr["SeqNum"];
             foreach(List item in CheckBoxList1.Items)
            {    
               for(int n = k; n <= i; n++) 
               {

               if (item.Selected)
               {

                  System.Web.UI.WebControls.Image img = new System.Web.UI.WebControls.Image();
                  string barcode_label = item.Text + "QTY:___________"


                 string barode_data = item.Value + datepicker.Text + n.ToSTring("D2");

                 Bitmap dynImage = DrawBarcode(barcode_data, barcode_label)

                 MemoryStream ms = new MemoryStream();

                 dynImage.Save(ms, ImageFormat.Jpeg);

                 byte[] byteImage = ms.ToArray();

                 Convert.ToBase64String(byteImage);

                 img.ImageUrl = "data:image/jpeg;base64," + Convert.ToBase64String(byteImage);

                 panel1.Controls.Add(img);

                 double spacing;

                 double mg = 5;

                spacing = img.Width.Value + mg;

             }

         } 

      }

   }

结果

此查询未显示任何结果。

SELECT * 
FROM `roomcalendar` 
WHERE day BETWEEN '2016-08-29' and '2016-08-31'

我可以使用roomname =＆＃39; Room-A＆＃39;但我不想用它。使用房间名称在两个日期之间获得两个可用房间的任何其他方法？

Answer 1

 SELECT * 
FROM `roomcalendar` r
WHERE DAY BETWEEN '2016-08-29' AND '2016-08-31' AND r.`avaroom`>0
ORDER BY r.`day`

Answer 2

如果我正确理解你的问题，你需要的东西可能是：

SELECT r.roomname, SUM(r.avaroom) as availableRooms
FROM roomcalendar r
WHERE DAY BETWEEN '2016-08-29' AND '2016-08-31'
GROUP BY r.roomname

我会给你：

+----------+----------------+
| roomname | availableRooms |
+----------+----------------+
| Room-A   |              5 |
| Room-B   |              4 |
+----------+----------------+

这是你想要的吗？

显示两个日期范围的结果？

2 个答案: