从 VB.NET 中的 SQL Server 中选择过去 24 小时的数据

Question

我的表中有两列，Date 和 Total_Amount。我需要显示过去 24 小时的数据，并对结果求和并使用 VB.NET 在文本框中显示该总和。

Dim cmd As New SqlCommand
cmd.Connection = cn
cmd.CommandText = "Select Sum(Total_Amount) as Total_AmountSum from Table_10"

Dim adapter As New SqlDataAdapter(cmd)
Dim table As New DataTable()
adapter.Fill(table)

If table.Rows.Count() > 0 Then
    TextBox1.Text = table.Rows(0)("Total_AmountSum").ToString()
End If

Answer 1

你必须在这里使用DATEADD

试试这个

过去 24 小时

    Dim cmd As New SqlCommand
    cmd.Connection = cn
    cmd.CommandText = "Select Sum(CASE WHEN [Date] BETWEEN DATEADD(day, -1, GETDATE()) AND GETDATE() THEN Total_Amount END) As Total_AmountSum from Table_10"
    Dim adapter As New SqlDataAdapter(cmd)
    Dim table As New DataTable()
    adapter.Fill(table)
    If table.Rows.Count() > 0 Then
        TextBox1.Text = table.Rows(0)("Total_AmountSum").ToString()
    End If

过去 1 个月

    Dim cmd As New SqlCommand
    cmd.Connection = cn
    cmd.CommandText = "Select Sum(CASE WHEN [Date] BETWEEN DATEADD(mm, -1, GETDATE()) AND GETDATE() THEN Total_Amount END) As Total_AmountSum from Table_10"
    Dim adapter As New SqlDataAdapter(cmd)
    Dim table As New DataTable()
    adapter.Fill(table)
    If table.Rows.Count() > 0 Then
        TextBox1.Text = table.Rows(0)("Total_AmountSum").ToString()
    End If

过去 1 周

Dim cmd As New SqlCommand
cmd.Connection = cn
cmd.CommandText = "Select Sum(CASE WHEN [Date] BETWEEN DATEADD(ww, -1, GETDATE()) AND GETDATE() THEN Total_Amount END) As Total_AmountSum from Table_10"
Dim adapter As New SqlDataAdapter(cmd)
Dim table As New DataTable()
adapter.Fill(table)
If table.Rows.Count() > 0 Then
    TextBox1.Text = table.Rows(0)("Total_AmountSum").ToString()
End If

Answer 2

您可能必须使用以下查询：

Select Sum(Total_Amount) as Total_AmountSum from Table_10
WHERE   [Date]>= DATEADD(day, -1, GETDATE())