背景:我有四个项目产品组合列表。我们网站上提供的每种产品/定制组合中的每一种。这四个列表适用于我们网站的四种语言。
产品/自定义组合的每个文本描述在数据库中是分开的,多年来,已发现某些产品/自定义组合的某些语言在数据库中缺失。 (即,SQL数据库中没有任何行,因此网站出现错误。)
问题:我有四个超过110,000个项目的列表,每个项目都缺少数据,为了简化,我们说我只有十个产品。
list 1 (L1): 1, 2, 3, 5, 6, 7, 8, 10
L2: 1, 2, 3, 4, 5, 6, 8, 9
L3: 1, 3, 4, 5, 6, 8, 9, 10
L4: 1, 2, 3, 4, 5, 6, 8, 9, 10
我现在在Excel文件的四列中有这四个列表。但是,当我现在尝试一个' For'循环遍历第一行直到End(xlUp).row ...它在大约6,000个条目后冻结。我的CPU为99%,Excel和令人惊讶的内存仍然大约1 GB(4 GB以外)。
我试图在Stack Overflow上找到其他解决方案,它让我找到了一个函数,它比较了两个包含整个列的变体。这是一种For each x in arr
类型的方法。这也被证明是无用的,因为我的计算机冻结了大约10,000个条目。
目标:在我给出的示例中,我的目标是为每种语言提供四个较小的缺失条目列表。在示例中:
L1: 4, 9
L2: 7
L3: 2, 7
L4: 7
我无能为力的两个主要问题:
7
这样的条目? (我假设将每个列表与其他列表进行比较,直到最后我将L1与其他列表进行比较,发现大多数列表中缺少7
效率不高。)
解决方案:我选择了以下答案并略微修改了他的代码。
我的计算机在循环期间冻结,其中有超过440,000个循环,我发现通过在循环中放置 DoEvents ,此命令可以提供Excel&# 39;一些空气呼吸'。当它运行 DoEvents 时,它会执行除当前运行的宏之外的任何备份任务,从而允许在宏运行期间编辑Excel文件。
另外,最后,当正在写入缺失项目列表时,如果刚刚检查的列表没有丢失,则出现错误,所以我只是使用 On Error resume next 以防万一。
Dim MyAr As Variant
Sub Sample()
Dim ws As Worksheet
Dim lRow As Long, n As Long, r As Long, j As Long
Dim Col As New Collection
Dim itm
Dim aCell As Range
Dim FinalList() As String
'~~> Let's say this sheet has the 4 lists in Col A to D
Set ws = ThisWorkbook.Sheets("Sheet2")
With ws
'~~> Find the last Row in Col A to D which has data
If Application.WorksheetFunction.CountA(.Cells) <> 0 Then
lRow = .Range("A:D").Find(What:="*", _
After:=.Range("A1"), _
Lookat:=xlPart, _
LookIn:=xlFormulas, _
SearchOrder:=xlByRows, _
SearchDirection:=xlPrevious, _
MatchCase:=False).Row
Else
lRow = 1
End If
'~~> Create a unique list
Dim z As Variant
z = 0
For Each aCell In .Range("A1:D" & lRow)
If Len(Trim(aCell.Value)) <> 0 Then
On Error Resume Next
Col.Add aCell.Text, CStr(aCell.Text)
On Error GoTo 0
End If
z = z + 1
Debug.Print z
DoEvents
Next
'~~> Output Column Say in Col J
r = 10
'~~> Loop through the list to match
For j = 1 To 4
Set aCell = .Range(.Cells(1, j), .Cells(lRow, j))
MyAr = aCell.Value
z = 0
For Each itm In Col
If ItemExist(itm) = False Then
ReDim Preserve FinalList(n)
FinalList(n) = itm
n = n + 1
End If
z = z + 1
Debug.Print z
DoEvents
Next
'~~> Output The results
.Cells(1, r).Value = "Missing List in List" & j
On Error Resume Next
.Cells(2, r).Resize(UBound(FinalList) + 1, 1).Value = _
Application.WorksheetFunction.Transpose(FinalList)
On Error GoTo 0
r = r + 1
Erase FinalList
n = 0
Next
End With
End Sub
Function ItemExist(sVal As Variant) As Boolean
Dim i As Long
For i = 0 To UBound(MyAr) - 1
If sVal = MyAr(i + 1, 1) Then
ItemExist = True
Exit For
End If
Next
End Function
答案 0 :(得分:2)
如果您的计算机一次难以应对所有四个列表,则一次一个可能是权宜之计。你可以像@Sid建议的那样,创建一个包含所有可能值的实例的综合列表,然后一次比较一种语言,将=IF(MATCH(A1,C:C,0)>0,"",)
等公式复制到适合的位置,其中ColumnA将是您的主列表, C等每个单独的语言列表。 #N/A
将指示ColumnC(等)中缺少ColumnA中的哪个值。
答案 1 :(得分:2)
好的,试试吧。这不使用任何公式,因此在Excel上很容易。一切都在记忆中完成。
<强>逻辑:强>
<强>代码:强>
Option Explicit
Dim MyAr As Variant
Sub Sample()
Dim ws As Worksheet
Dim lRow As Long, n As Long, r As Long, j As Long
Dim Col As New Collection
Dim itm
Dim aCell As Range
Dim FinalList() As String
'~~> Let's say this sheet has the 4 lists in Col A to D
Set ws = ThisWorkbook.Sheets("Sheet1")
With ws
'~~> Find the last Row in Col A to D which has data
If Application.WorksheetFunction.CountA(.Cells) <> 0 Then
lRow = .Range("A:D").Find(What:="*", _
After:=.Range("A1"), _
Lookat:=xlPart, _
LookIn:=xlFormulas, _
SearchOrder:=xlByRows, _
SearchDirection:=xlPrevious, _
MatchCase:=False).Row
Else
lRow = 1
End If
'~~> Create a unique list
For Each aCell In .Range("A1:D" & lRow)
If Len(Trim(aCell.Value)) <> 0 Then
On Error Resume Next
Col.Add aCell.Value, CStr(aCell.Value)
On Error GoTo 0
End If
Next
'~~> Output Column Say in Col J
r = 10
'~~> Loop through the list to match
For j = 1 To 4
Set aCell = .Range(.Cells(1, j), .Cells(lRow, j))
MyAr = aCell.Value
For Each itm In Col
If ItemExist(itm) = False Then
ReDim Preserve FinalList(n)
FinalList(n) = itm
n = n + 1
End If
Next
'~~> Output The results
.Cells(1, r).Value = "Missing List in List" & j
.Cells(2, r).Resize(UBound(FinalList) + 1, 1).Value = _
Application.WorksheetFunction.Transpose(FinalList)
r = r + 1
Erase FinalList
n = 0
Next
End With
End Sub
Function ItemExist(sVal As Variant) As Boolean
Dim i As Long
For i = 0 To UBound(MyAr) - 1
If sVal = MyAr(i + 1, 1) Then
ItemExist = True
Exit For
End If
Next
End Function
<强>截图:强>
假设您的列表看起来像这样
运行代码时,输出将在Col J开始生成