Find Duplicates, 2 Columns, Different Worksheets

Hello all,

I have worksheets that contain lists of addresses. My company receives a list of new members. The problem is, sometimes these new "members" are repeat members using a different name, but the same verified address. In the past they were able to get away, until we switched to excel. The problem is that the master list keeps growing and I want to make sure that these new members aren't repeat members. As of right now, their addresses are in Column D in both sheets (sheet 1 = master). Every 2 weeks we update the list.

The code needed:
I open the master sheet and run the following code to copy over the new data to the master workbook. As of right now, the code copies it to the master sheet (sheet1). Can you change it so it copies it to a new worksheet and titles the worksheet by today's current date (format: mm-dd-yy)? This is my current code:

Code:

---

Sub BulkImport()

  Dim InFileNames As Variant
  Dim fCtr As Long
  Dim tempWkbk As Workbook
  Dim consWks As Worksheet
  Set consWks = ThisWorkbook.Sheets(1)
  InFileNames = Application.GetOpenFilename _
  (FileFilter:="Excel Files, *.*", MultiSelect:=True)
  Application.ScreenUpdating = False
  If IsArray(InFileNames) Then
      For fCtr = LBound(InFileNames) To UBound(InFileNames)
        With Workbooks.Open(Filename:=InFileNames(fCtr))
                MsgBox "Number of cells that have data: " & Application.WorksheetFunction.CountA(.Sheets(1).Range("A2:J" & .Sheets(1).Range("A" & .Sheets(1).Rows.Count).End(xlUp).Row))
            .Sheets(1).Range("A1:J" & .Sheets(1).Range("A" & .Sheets(1).Rows.Count).End(xlUp).Row).Copy consWks.Range("A" & consWks.Rows.Count).End(xlUp)(2)
            .Close 0
        End With
      Next fCtr
  Else
      MsgBox "No file selected"
  End If
  With Application
      .StatusBar = True
      .ScreenUpdating = True
  End With
 
End Sub

---

Now that the data would be copied over, I would need to compare it with the unique list I already have in the master sheet (sheet1). It would need to compare against a list of over 10,000 (and growing), and then mark the duplicates found. I would then make sure manually that they really are duplicates (since sometimes people have the same address but a different unit number; unless you have a more efficient way to compare the two). I would delete the duplicates manually (most likely) and then have vba code copy over the new ones to the master sheet, continuing the growth of the unique list. I have a total of 10 columns (A-J).

Also, a previous admin poster explained to me the differences between ThisWorkbook and ActiveWorkbook. Are they interchangeable here? If I swap it out, will the code run as it should? Thanks for all your help!

I hope it's not too much!!

Respectfully,

Amit

Hi

Which column holds the unique key to compare ?

It will always be Column D (which is the address column) on all sheets.

Hi

try this. adjust the sheet names in the code.

Code:

---

Option Explicit

Sub kTest()
   
    Dim ka, k(), i As Long, n As Long, c As Long, d As Object
   
    Const MasterSheet  As String = "Sheet1"    '<< adjust
    Const NewData      As String = "Sheet2"    '<< adjust
   
    Set d = CreateObject("scripting.dictionary")
        d.comparemode = 1
   
    ka = ThisWorkbook.Worksheets(MasterSheet).Range("a1").CurrentRegion.Resize(, 10).Value2
   
    For i = 2 To UBound(ka, 1)
        If Len(Trim(ka(i, 4))) Then
            d.Item(Trim(ka(i, 4))) = Empty
        End If
    Next
   
    Erase ka
    ka = ThisWorkbook.Worksheets(NewData).Range("a1").CurrentRegion.Resize(, 10).Value2
    ReDim k(1 To UBound(ka, 1), 1 To UBound(ka, 2))
   
    For i = 2 To UBound(ka, 1)
        If Not d.exists(ka(i, 4)) Then
            n = n + 1
            For c = 1 To UBound(ka, 2)
                k(n, c) = ka(i, c)
            Next
        End If
    Next
   
    If n Then
        'append new record into the master sheet
        With ThisWorkbook.Worksheets(MasterSheet)
            .Range("a" & .Rows.Count).End(xlUp).Offset(1).Resize(n, UBound(k, 2)) = k
        End With
    End If
   
End Sub

---

Hmmm.... That code seems to just copy over the data from worksheet 2 to the master sheet. Is it removing duplicates along the way? In case I was unclear in my explanation, I'll attempt to explain in an organized manner:

1. Step 1: I receive a list of data with 65 columns and up to a 1000 rows of data. (many times a dozen or so of the rows won't have data in every column)
2. Step 2: I open the new list received and run the following code to clean up the data and keep only the relevant fields.
   Code:

   ---

   Sub MailOrganize()
    Columns("C:C").Insert Shift:=xlToRight, CopyOrigin:=xlFormatFromLeftOrAbove
    Columns("B:B").Select
    Selection.Copy
    Columns("C:C").Select
    Selection.PasteSpecial Paste:=xlPasteValues, Operation:=xlNone, SkipBlanks _
        :=False, Transpose:=False
    Set rngTemp1 = Range("B:B")
    With Range("A1,B1,C1,D1,E1,F1,G1,H1,I1,J1").Font
        .Bold = True
    End With
   
    Range("A1").Value = "SITE"
    Range("B1").Value = "TEMP_1"
    Range("C1").Value = "TEMP_2"
    Range("D1").Value = "ADDRESS_1"
    Range("E1").Value = "UNIT"
    Range("F1").Value = "CITY"
    Range("G1").Value = "STATE"
    Range("H1").Value = "ZIP"
    Range("I1").Value = "FIRST"
    Range("J1").Value = "LAST"
   
    Set rngTemp1 = Range("B1:B1000")
'    On Error GoTo SkipTemp1
    rngTemp1.SpecialCells(xlCellTypeBlanks).Select
    Dim l1Cell
    For Each l1Cell In Selection
    l1Cell.Value = " --- "
    Next
   
'SkipTemp1:
    Set rngTemp2 = Range("C1:C1000")
'    On Error GoTo SkipTemp2
    rngTemp2.SpecialCells(xlCellTypeBlanks).Select
    Dim l2Cell
    For Each l2Cell In Selection
    l2Cell.Value = " --- "
    Next
   
'SkipTemp2:
    Set rngSite = Range("A1:A1000")
'    On Error GoTo SkipSite
    rngSite.SpecialCells(xlCellTypeBlanks).Select
    Dim sCell
    For Each sCell In Selection
    sCell.Value = " --- "
    Next
   
'SkipSite:
    Set rngName = Range("I1:I1000")
'    On Error GoTo SkipName
    rngName.SpecialCells(xlCellTypeBlanks).Select
    Dim nameCell
    For Each nameCell In Selection
    nameCell.Value = " --- "
    Next
   
'SkipName:

End Sub

   ---

3. Step 3: In case the list didn't have a complete 1 thousand entries, I would clear the contents from any "---" marks continuing past the data down to the 1000 row.
4. Step 4: I would then close the list and open the Master workbook.
5. Step 5: I would run the following import script:
   Code:

   ---

   Sub BulkImport()

  Sheets(1).Select
  Dim Srt As Worksheet
  Set Srt = ActiveSheet
  Dim InFileNames As Variant
  Dim fCtr As Long
  Dim tempWkbk As Workbook
  Dim consWks As Worksheet
  Dim szToday As String
  szToday = Format(Date, "mm-dd-yy")
  Sheets.Add
  ActiveSheet.Move After:=Srt
  ActiveSheet.Name = szToday
  Set consWks = ActiveWorkbook.Sheets(2)
  InFileNames = Application.GetOpenFilename _
  (FileFilter:="Excel Files, *.*", MultiSelect:=True)
  Application.ScreenUpdating = False
  If IsArray(InFileNames) Then
      For fCtr = LBound(InFileNames) To UBound(InFileNames)
        With Workbooks.Open(Filename:=InFileNames(fCtr))
                MsgBox "Number of cells that have data: " & Application.WorksheetFunction.CountA(.Sheets(1).Range("A2:J" & .Sheets(1).Range("A" & .Sheets(1).Rows.Count).End(xlUp).Row))
            .Sheets(1).Range("A1:J" & .Sheets(1).Range("A" & .Sheets(1).Rows.Count).End(xlUp).Row).Copy consWks.Range("A" & consWks.Rows.Count).End(xlUp)(1)
            .Close 0
        End With
      Next fCtr
  Else
      MsgBox "No file selected."
  End If
  With Application
      .StatusBar = True
      .ScreenUpdating = True
  End With
 
End Sub

   ---

6. Step 6: I would then need to compare the new list to the list on the master sheet. I would need to find duplicates based on the members' addresses. The members' addresses will be listed in Column D. Should it find a duplicate, it would mark all the duplicates (preferably the entire row).
7. Step 7: I would then need to remove the duplicates after assessing that they really are duplicates since sometimes clients have similar addresses but with a different unit or suite number. One way I thought of is to have the duplicates marked on the temp worksheet, and copied to a new worksheet where the entire row with the duplicate found would be a green color background while the entire row being checked against from the master sheet would be copied underneath it to the new worksheet, and would have a yellow background. Although, I'm not sure if it's attainable through the code to do.
8. Step 8: I would then remove the duplicates from the temp worksheet.
9. Step 9: I would copy the new unique data over to the master sheet to the bottom, continuing the growth of the sheet. Since all the headers are the same, I would not need the first row from the temp worksheet to be copied over to the master sheet.

I really really appreciate it. I can't stress that enough. Thank you for all the help you can give.
If there is anything else needed from me, please let me know.

Respectfully,

Amit

Have you tried the code ? Try to run the code after importing the new list.

Hello Admin,

The code seems to copy data from the second worksheet to the master sheet. When scrolling through the data, there are many highlighted cells in Column C (?). Although, when searching for duplicates, there are none. So I'm guessing the code automatically removed the duplicates? If the code were to automatically remove duplicates, then I would need it to confirm that data in Column D are duplicates, as well as the data in Column E (which is the unit or apartment number) since some people may live in the same building. And since it would be automatically removing the duplicates, could it give me a msgbox stating how many duplicate rows were found at the end of the code? It is important that sheet2 not have the duplicates either since I will be needing to send a welcome mail to those new members. Also, the bulkimport macro creates a new sheet in the master workbook based on today's date. Could the code you wrote automatically look for sheet #2 instead of giving it a specific name? Bulkimport macro will make sure that the new sheet will always be sheet #2.

Thank you very much Admin.

Respectfully,

Amit

Hi

OK. Try this. untested.

Code:

---

Option Explicit

Sub kTest()
   
    Dim ka, k(), i As Long, n As Long, c As Long, d As Object
    Dim DupeCount  As Long, addr As String, wksNewData As Worksheet
   
    Const MasterSheet  As String = "Sheet1"    '<< adjust
   
    Set d = CreateObject("scripting.dictionary")
        d.comparemode = 1
   
    ka = ThisWorkbook.Worksheets(MasterSheet).Range("a1").CurrentRegion.Resize(, 10).Value2
   
    For i = 2 To UBound(ka, 1)
        If Len(Trim(ka(i, 4))) Then
            d.Item(Trim(ka(i, 4))) = Empty
        End If
    Next
       
    Erase ka
    Set wksNewData = ThisWorkbook.Worksheets(2)
    ka = wksNewData.Range("a1").CurrentRegion.Resize(, 10).Value2
    ReDim k(1 To UBound(ka, 1), 1 To UBound(ka, 2))
   
    For i = 2 To UBound(ka, 1)
        If Not d.exists(ka(i, 4)) Then
            n = n + 1
            For c = 1 To UBound(ka, 2)
                k(n, c) = ka(i, c)
            Next
        Else
            DupeCount = DupeCount + 1
            addr = addr & ",D" & i
            If Len(addr) > 245 Then
                wksNewData.Range(Mid(addr, 2)).Interior.Color = 65535
                addr = vbNullString
            End If
        End If
    Next
    If Len(addr) > 1 Then
        wksNewData.Range(Mid(addr, 2)).Interior.Color = 65535
        addr = vbNullString
    End If
    If n Then
        'append new record into the master sheet
        With ThisWorkbook.Worksheets(MasterSheet)
            .Range("a" & .Rows.Count).End(xlUp).Offset(1).Resize(n, UBound(k, 2)) = k
        End With
    End If
    If DupeCount Then
        MsgBox "There are " & DupeCount & " duplicates.", vbInformation
    End If
   
End Sub

---

Admin,

I tested your code. It looks great! It finds the duplicates in sheet2 and appends the unique data to the master sheet. It seems to be highlighting fields in Column C of the master sheet and I'm not sure why. Excel also doesn't let me sort by Cell Color On Top for Column C, so I'm not sure what the reason is for them being highlighted.

Also, I'd just like to make sure that the duplicate finding process is looking for matches in both columns D and E, since it is appending the unique values automatically, I don't want to miss people's unit numbers.

THANK YOU VERY MUCH!!!! It looks great!

I have one other request to the appending process: can you make it so when the new data is appended, automatically in Column K a new data field is created with the value of 0 ?

Again, thank you very much Admin. Your help is deeply appreciated.

- Amit

Edit: I cleared all the rules that were on the master sheet and it seems to fix the problem of the highlighting in column c, although I don't remember every putting a rule on. So that issue is done :)

Hi

replace

Code:

---

.Range("a" & .Rows.Count).End(xlUp).Offset(1).Resize(n, UBound(k, 2)) = k

---

with

Code:

---

.Range("a" & .Rows.Count).End(xlUp).Offset(1).Resize(n, 10) = k

---