如何选择今天 (24) 小时数据答案

【问题标题】：How to Select Today (24) Hours data如何选择今天 (24) 小时数据
【发布时间】：2019-12-13 16:21:09
【问题描述】：

我的表中有一列 (Total_Amount)。我只需要总结今天的记录（过去 24 小时），还需要总结上个月的 sql servervb.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

【问题讨论】：

您好，欢迎来到 SO！你有什么具体问题，帖子里没有说清楚？
我想要总和列 Total_Amount 只显示过去 24 小时的数据
这张表有时间栏可以看吗？
我只需要 Total_Amount 列数据
首先你现在运行代码

标签： sql sql-server vb.net

【解决方案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

最后 1 个弱点

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

【讨论】：

【解决方案2】：

看来您需要一门 SQL 入门课程。去网上搜索一下。 W3Schools 是一个很好的起点。

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())

【讨论】：