Technical Skill Tuesday: Comparing Two Lists in Excel|
Got a lot of lists in your life?
The very slick and very helpful Excel RainMan has got us in a tizzy of Excel tips lately, so we thought we’d share our favorite new tip:
Sometimes it’s important to compare lists. It’s an awkward move to have to make– especially if your lists are in Excel. Usually you’re left trying to make some awkward TRUE, FALSE workaround then hit up a VLOOKUP of all the “FALSE” values. But it turns out that there’s something far simpler than sneaking your way around your two lists to compare them. And it’s the following VBA code (say ‘thank you’ with chocolate!):
Sub CompareWorksheets(ws1 As Worksheet, ws2 As Worksheet) Dim r As Long, c As Integer Dim lr1 As Long, lr2 As Long, lc1 As Integer, lc2 As Integer Dim maxR As Long, maxC As Integer, cf1 As String, cf2 As String Dim rptWB As Workbook, DiffCount As Long Application.ScreenUpdating = False Application.StatusBar = "Creating the report..." Set rptWB = Workbooks.Add Application.DisplayAlerts = False While Worksheets.Count > 1 Worksheets(2).Delete Wend Application.DisplayAlerts = True With ws1.UsedRange lr1 = .Rows.Count lc1 = .Columns.Count End With With ws2.UsedRange lr2 = .Rows.Count lc2 = .Columns.Count End With maxR = lr1 maxC = lc1 If maxR < lr2 Then maxR = lr2 If maxC < lc2 Then maxC = lc2 DiffCount = 0 For c = 1 To maxC Application.StatusBar = "Comparing cells " & Format(c / maxC, "0 %") & "..." For r = 1 To maxR cf1 = "" cf2 = "" On Error Resume Next cf1 = ws1.Cells(r, c).FormulaLocal cf2 = ws2.Cells(r, c).FormulaLocal On Error GoTo 0 If cf1 <> cf2 Then DiffCount = DiffCount + 1 Cells(r, c).Formula = "'" & cf1 & " <> " & cf2 End If Next r Next c Application.StatusBar = "Formatting the report..." With Range(Cells(1, 1), Cells(maxR, maxC)) .Interior.ColorIndex = 19 With .Borders(xlEdgeTop) .LineStyle = xlContinuous .Weight = xlHairline End With With .Borders(xlEdgeRight) .LineStyle = xlContinuous .Weight = xlHairline End With With .Borders(xlEdgeLeft) .LineStyle = xlContinuous .Weight = xlHairline End With With .Borders(xlEdgeBottom) .LineStyle = xlContinuous .Weight = xlHairline End With On Error Resume Next With .Borders(xlInsideHorizontal) .LineStyle = xlContinuous .Weight = xlHairline End With With .Borders(xlInsideVertical) .LineStyle = xlContinuous .Weight = xlHairline End With On Error GoTo 0 End With Columns("A:IV").ColumnWidth = 20 rptWB.Saved = True If DiffCount = 0 Then rptWB.Close False End If Set rptWB = Nothing Application.StatusBar = False Application.ScreenUpdating = True MsgBox DiffCount & " cells contain different formulas!", vbInformation, _ "Compare " & ws1.Name & " with " & ws2.Name End Sub