Comparing and Updating 2 Different Worksheets - vba

Question

I need to compare 1 worksheet (Sheet1) to another similar worksheet (Sheet2)
Sheet2 contains up to date information,which needs to be transferred to Sheet1.
However, I've run into a couple of problems:
There are some rows in Sheet1 that are not Sheet2. These need to be ignored/skipped over
There are some rows in Sheet2 that are not Sheet1. These need to be appended to the end of Sheet1
If a row exists in both Sheets, the information from the row sheet 2 needs to be transferred to the corresponding row in Sheet1
For what its worth, they have same number of columns and the column titles are exactly the same.
I've tried using a dictionary object to accomplish this but am still having all sorts of trouble.
Here's the code I have tried thus far:
Sub createDictionary()
Dim dict1, dict2 As Object
Set dict1 = CreateObject("Scripting.Dictionary")
Set dict2 = CreateObject("Scripting.Dictionary")
Dim maxRows1, maxRows2 As Long
Dim i, ii, j, k As Integer
maxRows1 = Worksheets("Sheet1").Range("A65000").End(xlUp).Row
For i = 2 To maxRows1
Dim cell1 As String
cell1 = Worksheets("Sheet1").cells(i, 2).Text & " " & Worksheets("Sheet1").cells(i, 11).Text
If Not dict1.Exists(cell1) Then
dict1.Add cell1, cell1
End If
Next i
maxRows2 = Worksheets("Sheet2").Range("A65000").End(xlUp).Row
For ii = 2 To maxRows2
Dim cell2 As String
cell2 = Worksheets("Sheet2").cells(ii, 11).Text
If Not dict2.Exists(cell2) Then
dict2.Add cell2, cell2
End If
Next ii
Dim rngSearch1, rngFound1, rngSearch2, rngFound2 As Range
For j = 2 To maxRows1
Dim Sheet1Str, Sheet2Str As String
Sheet1Str = Worksheets("Sheet1").cells(j, 2).Text & " " & Worksheets("Sheet1").cells(j, 11).Text
Sheet2Str = Worksheets("Sheet2").cells(j, 11).Text
If dict2.Exists(Sheet1Str) = False Then
'ElseIf Not dict1.Exists(Sheet2) Then
'
' Worksheets("Sheet2").Range("A" & j & ":" & "Z" & j).Copy
' Worksheets("Sheet1").Range("A" & maxRows1 + 1).Insert
' Worksheets("Sheet1").Range("A" & maxRows1 + 1).Interior.Color = RGB(255, 255, 0)
' Worksheets("Sheet1").Range("U" & maxRows1 + 1) = "INCH"
' Worksheets("Sheet1").Range("Q" & maxRows1 + 1) = "FPM"
' Worksheets("Sheet1").Range("S" & maxRows1 + 1) = "INCHES WIDE"
' Worksheets("Sheet2").Range("K" & j) = Replace(Worksheets("Sheet2").Range("K" & j), Worksheets("Sheet2").Range("B" & j), "")
' Worksheets("Sheet1").Range("K" & maxRows1 + 1) = Trim(Worksheets("Sheet2").Range("K" & j))
Else
For k = 3 To 6
If Not k = 11 Then
If Not UCase(Worksheets("Sheet1").cells(j, k).Value) = UCase(Worksheets("Sheet2").cells(j, k).Value) Then
Worksheets("Sheet1").cells(j, k).Value = Worksheets("Sheet2").cells(j, k).Value
End If
End If
Next k
End If
Next j
End Sub

Answer 1

Cool question, and the "does row order matter" question above lends itself nicely to using Excel's built in Range.RemoveDuplicates method. Let's get into it...
Suppose Sheet1 looks like this:
Let's say Sheet2 looks like this:
All the conditions that are described in your original question are met here. Namely:
There are rows on Sheet1 that are not on Sheet2 (row 2, for example). These will be left alone.
There are rows on Sheet2 that are not on Sheet1 (row 2, for example). These will be added to Sheet1.
There are rows that are the same on Sheet2 and Sheet1, save for a single update. (Row 7 on Sheet2, for example.) These rows will be updated on Sheet1. Of course, your situation will be different -- perhaps more columns might be updated, or they might not be in column E like my example -- you'll need to do a bit of customization here.
The following heavily-commented script walks through copying data from Sheet2 to Sheet1, then letting Excel's built-in Range.RemoveDuplicates method kill all of the rows that have been updated in column E. The script also makes use of a couple handy functions: LastRowNum and LastColNum.
Option Explicit
Sub MergeSheetTwoIntoSheetOne()
Dim Range1 As Range, Range2 As Range
Dim LastRow1 As Long, LastRow2 As Long, _
LastCol As Long
'setup - set references up-front
LastRow2 = LastRowNum(Sheet2)
LastRow1 = LastRowNum(Sheet1)
LastCol = LastColNum(Sheet1) '<~ last col the same on both sheets
'setup - identify the data block on sheet 2
With Sheet2
Set Range2 = .Range(.Cells(2, 1), .Cells(LastRow2, LastCol))
End With
'setup - identify the data block on sheet 1
With Sheet1
Set Range1 = .Range(.Cells(2, 1), .Cells(LastRow1, LastCol))
End With
'step 1 - move the data block on sheet 1 down the sheet
' to allow room for the data block from sheet 2
Range1.Cut Destination:=Sheet1.Cells(LastRow2 + 1, 1)
'step 2 - move the data block from sheet 2 into the recently-
' cleared space on sheet 1
Range2.Copy Destination:=Sheet1.Cells(2, 1)
'step 3 - find the NEW last row on sheet 1
LastRow1 = LastRowNum(Sheet1)
'step 4 - use excel's built-in duplicate removal to
' kill all dupes on every column EXCEPT for those
' that might have been updated on sheet 2...
' in this example, Column E is where updates take place
With Sheet1
Set Range1 = .Range(.Cells(2, 1), .Cells(LastRow1, LastCol))
Range1.RemoveDuplicates Columns:=Array(1, 2, 3, 4), Header:=xlYes
End With
End Sub
'this handy function allows us to find the last row with a one-liner
Public Function LastRowNum(Sheet As Worksheet) As Long
If Application.WorksheetFunction.CountA(Sheet.Cells) <> 0 Then
LastRowNum = Sheet.Cells.Find(What:="*", _
LookIn:=xlFormulas, _
SearchOrder:=xlByRows, _
SearchDirection:=xlPrevious).Row
Else
LastRowNum = 1
End If
End Function
'this handy function allows us to find the last column with a one-liner
Public Function LastColNum(Sheet As Worksheet) As Long
If Application.WorksheetFunction.CountA(Sheet.Cells) <> 0 Then
LastColNum = Sheet.Cells.Find(What:="*", _
LookIn:=xlFormulas, _
SearchOrder:=xlByColumns, _
SearchDirection:=xlPrevious).Column
Else
LastColNum = 1
End If
End Function
Running this script results in the following: