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Highlight Difference between two Sheets in the same workbook?

I have an interesting problem I think. I need to develop a VBA code to compare two Excel worksheets to find the differences, if any, for each store number listed on the current tab. As you can see from the abbreviated sample attached they are in random order and not all store numbers are listed on both sheets. This would be a simple manual process if not comparing 1500 lines and 85 columns of information.

I also need to highlight the entire line of data if a store number is not found on last weeks report tab.

Highlight-Differences-Sample.xlsx

leonstryker

Step one: Concatenate all data for each row for both sheets.
Step two: Search each row in sheet1 for a corresponding row in sheet2 and highlight as required
Step three: Search each row in sheet2 for a corresponding row in sheet1 and highlight as required
Step four: Delete/Erase the concatenated fields

Leon

Tom Black

ASKER

I need to locate not only the store that has data changed but which cell in the store row has changed

leonstryker

I need to locate not only the store that has data changed but which cell in the store row has changed

Why? You wanted to highlight the whole row in your question? Besides, how will you know which row should be matched to which other row for the cell to cell comparision without any kind of an identifier?

Tom Black

ASKER

The store # is the identifier

Tom Black

ASKER

and I said Highlight the changes(I need to locate not only the store that has data changed but which cell in the store row has changed) BUT highlight the entire line of data if a store number is not found on last weeks report tab.

leonstryker

The store # is the identifier

That is not enough since its not unique. For example Store #20 occurs 2 times on the 'Last Week' tab but once on the 'Cuerrent' tab, how would the application know which should it be matched vs?

ASKER CERTIFIED SOLUTION

Saqib Husain

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Tom Black

ASKER

Sorry about the dup -- On the working file the store is unique and will only be listed once.

Saqib Husain

Did you try the code?

Tom Black

ASKER

Worked Perectly

Tom Black

ASKER

Could you please take sometime to explain the code for me?

Saqib Husain

With pleasure

Sub hiliteDiff()
Dim cw As Worksheet
Dim lw As Worksheet
Set cw = Worksheets("Cuerrent")
Set lw = Worksheets("Last week")

'*****remove all colors from current week sheet
cw.UsedRange.Offset(1, 0).Interior.Pattern = xlNone

'**** loop through each row in the current week worksheet
For Each rs In cw.UsedRange.Rows
'*****This section only takes care of non-blanks in the first column of the current week worksheet
If rs.Cells(1, 1) <> "" Then
'******this checks if there is a row in last week which matches a row in current week
mr = Application.Match(rs.Cells(1, 1), lw.Range("A:A"), 0)

'******if there is no match then mr contains an error in which case the entire row is given color 65535(yellow)
If IsError(mr) Then
rs.Interior.Color = 65535
'*****if there is a match (ie mr does not have an error) then it checks individual cells (columns 2 to 4)
Else
For i = 2 To 4
'*****if the individual cells do not match then the cell is colored 255(red)
If rs.Cells(1, i) <> lw.Cells(mr, i) Then rs.Cells(1, i).Interior.Color = 255
Next i
End If
End If
Next rs

End Sub

Tom Black

ASKER

Each rs In cw.UsedRange.Rows
The "rs" is what is throwing me along with rs.Cells(1, 1) which seems to be written as a worksheet.

Saqib Husain

rs is a row in the current worksheet. In the first instance I intended to type a rw but ended up in rs accidentally. Just used it as-is instead of correcting it.

when I use rs.cells(1,1) it considers rs to be a worksheet with number of rows equal to 1 and the number of columns equal to the number of columns used int the worksheet (cw.usedrange)

Saqib