Compare values in 2 columns, if values match copy value in adjacent cell to new colum

Hello VBA experts,

Its been a long while since i tried using VBA and I'm running in to some problems. Im columns A-E in a spreadsheet and attempting the following:

Columns A,B & D are populated with data. I need to:
1. loop through the values in column D
2. Compare each value in column D to all of the values in column A
3. If there is a match, copy cell B which corresponds to the matching value in column A
4. Paste that value in column E next to the corresponding matching value in column D


If thats not too confusing...

So as an example:

A_B_C_D_E
a_1___r
g_2___a_1
e_3___b
d_4___c
t_5___n

In column D, a match for "a" is found in column A, row 1, and the value in column A, row 2 is pasted to the matching "a" in Column E.

All ranges would need to be dynamic.

I've tried piecing this together from examples i've found with not luck so far. Below is what i've been working with. I know its incorrect, and results in copying all of the values in column A to column E.

Code:

---

Sub compareAndCopy()

    Dim lastRowA As Long
    Dim lastRowD As Long
    Dim lastRowE As Long
    Dim i As Integer
    Dim j As Integer


    Application.ScreenUpdating = False


    lastRowD = Sheets("Sheet1").Cells(Sheets("Sheet1").Rows.Count, "D").End(xlUp).Row
    lastRowA = Sheets("Sheet1").Cells(Sheets("Sheet1").Rows.Count, "A").End(xlUp).Row
    lastRowE = Sheets("Sheet1").Cells(Sheets("Sheet1").Rows.Count, "E").End(xlUp).Row


    For i = 1 To lastRowD
        For j = 1 To lastRowA


            If Sheets("Sheet1").Cells(i, 1).Value = Sheets("Sheet1").Cells(j, 1).Value Then
                Sheets("Sheet1").Cells(i, 1).Offset(, 1).Copy Destination:=Sheets("Sheet1").Cells(i, 1).Offset(, 4)
        Exit For
  Exit For
            End If
        Next j
    Next i
    Application.ScreenUpdating = True
End Sub

---

I've attached the spreadsheet as well.

Any help would be greatly appreciated!

Thanks,

ChrisAttachment 23006

To anyone interested, this worked for me:

Code:

---

With Range("E2:E" & Range("D" & Rows.Count).End(xlUp).Row)
    .Columns(1).Formula = "=IFERROR(VLOOKUP(D2,A,2,0),"""")"
    .Columns(2).Formula = "=IFERROR(INDEX(B:B,MATCH(D2,A:A,0)),"""")"
    .Value = .Value
End With

---

Could a Column D value appear more than once in Column A?
I didn't have to ask as they do on multiple occasions.

It does not take long on your example attachment but it might take a few seconds on a very large file.

Code:

---

Sub Maybe()
Dim i As Long, ii As Long
Application.ScreenUpdating = False
    For i = 2 To Cells(Rows.Count, "D").End(xlUp).Row
        For ii = 2 To Cells(Rows.Count, "A").End(xlUp).Row
            If Cells(ii, 1) = Cells(i, 4) Then Cells(i, Cells(i, Columns.Count).End(xlToLeft).Offset(, 1).Column) = Cells(ii, 1).Offset(, 1).Value
        Next ii
    Next i
Application.ScreenUpdating = True
End Sub

---

I also did tried this.. but the values from column D are not comparing to the A. What do you think where I am going wrong.
.