Question

我的表中有一列（总计）。我需要总结今天的记录（过去24小时），也需要总结上个月的sql server vb.net。

Dim cmd As New SqlCommand
        cmd.Connection = cn
        cmd.CommandText = "Select Sum(Total_Amount) as Total_AmountSum from Table_5"
        Dim adapter As New SqlDataAdapter(cmd)
        Dim table As New DataTable()
        adapter.Fill(table)
        If table.Rows.Count() > 0 Then
            Label11.Text = table.Rows(0)("Total_AmountSum").ToString()
        End If

Answer 1

您必须在此处使用 DATEADD

尝试一下

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

最后1个弱项

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

您似乎需要SQL入门课程。去搜索互联网。 W3Schools是一个不错的起点。

与此同时...

select Sum(Total_Amount) as Total_AmountSum
from Table_5
where MyDate between dateadd(hour, -24, getdate()) and getdate()

...或...

select Sum(Total_Amount) as Total_AmountSum
from Table_5
where MyDate > dateadd(hour, -24, getdate())

如何选择今天（24）小时数据

2 个答案: