Excel VBA - 查找值列表的最小值？

Excel VBA - Find minimum of list of values?

提问by John M

For a list like:

对于像这样的列表：

Column1     Column2     Column3    
DataA       1           1234    
DataA       2           4678    
DataA       3           8910    
DataB       2           1112    
DataB       4           1314    
DataB       9           1516

How do I get a list like this:

我如何获得这样的列表：

Column4    Column5      Column6    
DataA      1            1234    
DataB      2            1112

The key is to only return the minimum value in column2 and its corresponding column3 value.

关键是只返回 column2 中的最小值及其对应的 column3 值。

回答by marg

Sorry I misunderstood your Question First. Here is a working code that ended up more complex than I wanted it to be :D

抱歉，我首先误解了您的问题。这是一个工作代码，最终比我想要的更复杂：D

Option Explicit

Private Function inCollection(ByRef myCollection As Collection, ByRef value As Variant) As Boolean
    Dim i As Integer
    inCollection = False

    For i = 1 To myCollection.Count
        If (myCollection(i) = value) Then
            inCollection = True
            Exit Function
        End If
    Next i
End Function

Sub listMinimums()

    Dim source As Range
    Dim target As Range
    Dim row As Range
    Dim i As Integer
    Dim datas As New Collection
    Dim minRows As New Collection

    Set source = Range("A2:C5")
    Set target = Range("D2")
    target.value = source.value

    For Each row In source.Rows
        With row.Cells(1, 1)
            If (inCollection(datas, .value) = False) Then
                datas.Add .value
                minRows.Add row.row, .value
            End If
            If (Me.Cells(minRows(.value), 2) > row.Cells(1, 2)) Then
                minRows.Remove (.value)
                minRows.Add row.row, .value
            End If
        End With
    Next row

    'output'
    For i = 1 To minRows.Count
        target(i, 1) = Me.Cells(minRows(i), 1)
        target(i, 2) = Me.Cells(minRows(i), 2)
        target(i, 3) = Me.Cells(minRows(i), 3)
    Next i

    Set datas = Nothing
    Set minRows = Nothing
End Sub

Note: You might want to replace Mewith the name of your sheet.

注意：您可能想要替换Me为您的工作表的名称。

回答by Fionnuala

An example using ADO.

使用 ADO 的示例。

Dim cn As Object
Dim rs As Object
Dim strFile As String
Dim strCon As String
Dim strSQL As String
Dim i As Integer

''http://support.microsoft.com/kb/246335

strFile = ActiveWorkbook.FullName
strCon = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & strFile _
    & ";Extended Properties=""Excel 8.0;HDR=Yes;IMEX=1"";"

Set cn = CreateObject("ADODB.Connection")
Set rs = CreateObject("ADODB.Recordset")

cn.Open strCon

strSQL = "SELECT Column1, Min(Column3) As MinCol3 FROM [Sheet8$] GROUP BY Column1"

rs.Open strSQL, cn, 3, 3

For i = 0 To rs.fields.Count - 1
    Sheets("Sheet7").Cells(1, i + 1) = rs.fields(i).Name
Next

Worksheets("Sheet7").Cells(2, 1).CopyFromRecordset rs

回答by Oorang

Try this:

尝试这个：

Public Sub MinList()
    Const clColKey_c As Long = 1&
    Const clColVal_c As Long = 3&
    Dim ws As Excel.Worksheet, objDict As Object
    Dim lRow As Long, dVal As Double, sKey As String
    Dim lRowFrst As Long, lRowLast As Long, lColOut As Long
    Set ws = Excel.ActiveSheet
    Set objDict = CreateObject("Scripting.Dictionary")
    lRowFrst = ws.UsedRange.Row
    lRowLast = ws.UsedRange.Rows.Count
    lColOut = ws.UsedRange.Columns.Count + 1&
    For lRow = lRowFrst To lRowLast
        dVal = Val(ws.Cells(lRow, clColVal_c).Value)
        sKey = ws.Cells(lRow, clColKey_c).Value
        If objDict.Exists(sKey) Then
            If dVal > objDict.Item(sKey) Then objDict.Item(sKey) = dVal
        Else
            objDict.Add sKey, dVal
        End If
    Next
    For lRow = lRowFrst To lRowLast
        ws.Cells(lRow, lColOut).Value = objDict.Item(ws.Cells(lRow, clColKey_c).Value)
    Next
    ws.Cells(1&, lColOut).Value = "Min"
End Sub