Code to highlight rows when data range is before previous date.

Dazzawm

Dazzawm

Well-known Member
Joined
Jan 24, 2011
Messages
3,786
Office Version
  1. 365
Platform
  1. Windows
Tricky one to explain this. I have a file where I need to know if any row of dates are earlier than the rows before. The code first needs to look at column K and all the numbers that match. In the example below I have highlighted in yellow the ones that are incorrect. If you look at N6&7/O6&7 the date is earlier than P5/Q5 above. The same with N12&13/O12&13 is earlier than P11/Q11.

The ones in blue are as it should be, they all follow on from each other. Like I say difficult to explain but please let me know if more clarification is needed.

Excel 2010
KLMNOPQ
IdentifierSMSYEMEY
M10306960000001031994121997
M10306960000001031994121997
M10306960000001031994121997
M18912550000000062016122016
M18912550000000062016122016
M18912550000000062016122016
M18900900000002022015
M18900900000002022015
M18900900000002022015
M18912170000007052016
M18912170000007052016
M18912170000007052016

<colgroup><col style="width: 25pxpx" https:="" www.mrexcel.com="" forum="" usertag.php?do="list&action=hash&hash=DAE7F5"" target="_blank"></colgroup><colgroup><col><col><col><col><col><col><col></colgroup><thead>
</thead><tbody>
[TD="align: center"]1[/TD]

[TD="align: center"]2[/TD]

[TD="align: center"]3[/TD]

[TD="align: center"]4[/TD]

[TD="align: center"]5[/TD]
[TD="bgcolor: #FFFF00"]M10306960000002[/TD]
[TD="bgcolor: #FFFF00"][/TD]
[TD="bgcolor: #FFFF00"][/TD]
[TD="bgcolor: #FFFF00"]03[/TD]
[TD="bgcolor: #FFFF00"]1994[/TD]
[TD="bgcolor: #FFFF00"]12[/TD]
[TD="bgcolor: #FFFF00"]1995[/TD]

[TD="align: center"]6[/TD]
[TD="bgcolor: #FFFF00"]M10306960000002[/TD]
[TD="bgcolor: #FFFF00"][/TD]
[TD="bgcolor: #FFFF00"][/TD]
[TD="bgcolor: #FFFF00"]03[/TD]
[TD="bgcolor: #FFFF00"]1994[/TD]
[TD="bgcolor: #FFFF00"]12[/TD]
[TD="bgcolor: #FFFF00"]1999[/TD]

[TD="align: center"]7[/TD]
[TD="bgcolor: #FFFF00"]M10306960000002[/TD]
[TD="bgcolor: #FFFF00"][/TD]
[TD="bgcolor: #FFFF00"][/TD]
[TD="bgcolor: #FFFF00"]03[/TD]
[TD="bgcolor: #FFFF00"]1994[/TD]
[TD="bgcolor: #FFFF00"]12[/TD]
[TD="bgcolor: #FFFF00"]1999[/TD]

[TD="align: center"]8[/TD]

[TD="align: center"]9[/TD]

[TD="align: center"]10[/TD]

[TD="align: center"]11[/TD]
[TD="bgcolor: #FFFF00"]M18900900000001[/TD]
[TD="bgcolor: #FFFF00"][/TD]
[TD="bgcolor: #FFFF00"][/TD]
[TD="bgcolor: #FFFF00"]02[/TD]
[TD="bgcolor: #FFFF00"]2015[/TD]
[TD="bgcolor: #FFFF00"]12[/TD]
[TD="bgcolor: #FFFF00"]2015[/TD]

[TD="align: center"]12[/TD]
[TD="bgcolor: #FFFF00"]M18900900000001[/TD]
[TD="bgcolor: #FFFF00"][/TD]
[TD="bgcolor: #FFFF00"][/TD]
[TD="bgcolor: #FFFF00"]02[/TD]
[TD="bgcolor: #FFFF00"]2015[/TD]
[TD="bgcolor: #FFFF00"][/TD]
[TD="bgcolor: #FFFF00"][/TD]

[TD="align: center"]13[/TD]
[TD="bgcolor: #FFFF00"]M18900900000001[/TD]
[TD="bgcolor: #FFFF00"][/TD]
[TD="bgcolor: #FFFF00"][/TD]
[TD="bgcolor: #FFFF00"]02[/TD]
[TD="bgcolor: #FFFF00"]2015[/TD]
[TD="bgcolor: #FFFF00"][/TD]
[TD="bgcolor: #FFFF00"][/TD]

[TD="align: center"]14[/TD]

[TD="align: center"]15[/TD]

[TD="align: center"]16[/TD]

[TD="align: center"]17[/TD]
[TD="bgcolor: #FFFF00"]M18912170000009[/TD]
[TD="bgcolor: #FFFF00"][/TD]
[TD="bgcolor: #FFFF00"][/TD]
[TD="bgcolor: #FFFF00"]04[/TD]
[TD="bgcolor: #FFFF00"]2015[/TD]
[TD="bgcolor: #FFFF00"]04[/TD]
[TD="bgcolor: #FFFF00"]2017[/TD]

[TD="align: center"]18[/TD]
[TD="bgcolor: #FFFF00"]M18912170000009[/TD]
[TD="bgcolor: #FFFF00"][/TD]
[TD="bgcolor: #FFFF00"][/TD]
[TD="bgcolor: #FFFF00"]04[/TD]
[TD="bgcolor: #FFFF00"]2016[/TD]
[TD="bgcolor: #FFFF00"]04[/TD]
[TD="bgcolor: #FFFF00"]2017[/TD]

[TD="align: center"]19[/TD]
[TD="bgcolor: #00B0F0"]M18912170000002[/TD]
[TD="bgcolor: #00B0F0"][/TD]
[TD="bgcolor: #00B0F0"][/TD]
[TD="bgcolor: #00B0F0"]02[/TD]
[TD="bgcolor: #00B0F0"]2015[/TD]
[TD="bgcolor: #00B0F0"]12[/TD]
[TD="bgcolor: #00B0F0"]2015[/TD]

[TD="align: center"]20[/TD]
[TD="bgcolor: #00B0F0"]M18912170000002[/TD]
[TD="bgcolor: #00B0F0"][/TD]
[TD="bgcolor: #00B0F0"][/TD]
[TD="bgcolor: #00B0F0"]01[/TD]
[TD="bgcolor: #00B0F0"]2016[/TD]
[TD="bgcolor: #00B0F0"]12[/TD]
[TD="bgcolor: #00B0F0"]2016[/TD]

[TD="align: center"]21[/TD]
[TD="bgcolor: #00B0F0"]M18912170000002[/TD]
[TD="bgcolor: #00B0F0"][/TD]
[TD="bgcolor: #00B0F0"][/TD]
[TD="bgcolor: #00B0F0"]01[/TD]
[TD="bgcolor: #00B0F0"]2017[/TD]
[TD="bgcolor: #00B0F0"][/TD]
[TD="bgcolor: #00B0F0"][/TD]

[TD="align: center"]22[/TD]

[TD="align: center"]23[/TD]

[TD="align: center"]24[/TD]

</tbody>

​
Edit

In hindsight its probably better if the code looks for matches in column C rather than K please.
 
Last edited:
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Excel Facts

Format cells as date
Select range and press Ctrl+Shift+3 to format cells as date. (Shift 3 is the # sign which sort of looks like a small calendar).
If P6560 was truly blank then that line of code wouldn't get executed:

Code: 
    If Cells(thisRow, "P").Value <> "" Then

This is a more defensive option for dealing with non-numeric cells:

Code: 
Public Sub CheckSequentialDates()

Dim lastRow As Long
Dim thisRow As Long
Dim firstRow As Long
Dim inError As Boolean

' Get the last row of data
lastRow = Cells(Rows.Count, "C").End(xlUp).Row + 1

' Set up other variables
inError = False
firstRow = 1

' Process all rows
For thisRow = 2 To lastRow
    ' Is this the same identifier as the last row?
    If Cells(thisRow, "C").Value = Cells(thisRow - 1, "C").Value Then
        ' If the dates are the same as the last row then there's nothing to do
        If Cells(thisRow, "N").Value <> Cells(thisRow - 1, "N").Value _
        Or Cells(thisRow, "O").Value <> Cells(thisRow - 1, "O").Value _
        Or Cells(thisRow, "P").Value <> Cells(thisRow - 1, "P").Value _
        Or Cells(thisRow, "Q").Value <> Cells(thisRow - 1, "Q").Value Then
            ' Make sure we have numeric values
            If IsNumeric(Cells(thisRow, "O").Value) _
            And IsNumeric(Cells(thisRow, "N").Value) _
            And IsNumeric(Cells(thisRow - 1, "Q").Value) _
            And IsNumeric(Cells(thisRow - 1, "P").Value) Then
                ' Is the start date before the previous end date?
                If DateSerial(Cells(thisRow, "O").Value, Cells(thisRow, "N").Value, 1) < DateSerial(Cells(thisRow - 1, "Q").Value, Cells(thisRow - 1, "P").Value, 1) Then
                    ' Flag this group as being in error
                    inError = True
                End If
            End If
        End If
    Else
        ' Highlight the group if there's been an error
        If inError Then Range(Cells(firstRow, "C"), Cells(thisRow - 1, "Q")).Interior.Color = vbYellow
        
        ' The new group is not in error - remember the row it started on
        inError = False
        firstRow = thisRow
    End If
    
    ' Check for invalid dates on this row
    If IsNumeric(Cells(thisRow, "N").Value) _
    And IsNumeric(Cells(thisRow, "O").Value) _
    And IsNumeric(Cells(thisRow, "P").Value) _
    And IsNumeric(Cells(thisRow, "Q").Value) Then
        If DateSerial(Cells(thisRow, "O").Value, Cells(thisRow, "N").Value, 1) > DateSerial(Cells(thisRow, "Q").Value, Cells(thisRow, "P").Value, 1) Then
            inError = True
        End If
    End If
Next thisRow

End Sub

WBD
 
Upvote 0
Unfortunately now that highlights all rows without an end date in P & Q? In my very first post rows 14, 15 & 16 are being highlighted when they should be left clear as there is nothing wrong with them.
 
Upvote 0
OK. *Sigh*. It's hard sailing blind without having the actual data to hand. One last try:

Code: 
Public Sub CheckSequentialDates()

Dim lastRow As Long
Dim thisRow As Long
Dim firstRow As Long
Dim inError As Boolean

' Get the last row of data
lastRow = Cells(Rows.Count, "C").End(xlUp).Row + 1

' Set up other variables
inError = False
firstRow = 1

' Process all rows
For thisRow = 2 To lastRow
    ' Is this the same identifier as the last row?
    If Cells(thisRow, "C").Value = Cells(thisRow - 1, "C").Value Then
        ' If the dates are the same as the last row then there's nothing to do
        If Cells(thisRow, "N").Value <> Cells(thisRow - 1, "N").Value _
        Or Cells(thisRow, "O").Value <> Cells(thisRow - 1, "O").Value _
        Or Cells(thisRow, "P").Value <> Cells(thisRow - 1, "P").Value _
        Or Cells(thisRow, "Q").Value <> Cells(thisRow - 1, "Q").Value Then
            ' Make sure we have numeric values
            If Trim(Cells(thisRow, "O").Value) <> "" _
            And Trim(Cells(thisRow, "N").Value) <> "" _
            And Trim(Cells(thisRow - 1, "Q").Value) <> "" _
            And Trim(Cells(thisRow - 1, "P").Value) <> "" Then
                ' Is the start date before the previous end date?
                If DateSerial(Cells(thisRow, "O").Value, Cells(thisRow, "N").Value, 1) < DateSerial(Cells(thisRow - 1, "Q").Value, Cells(thisRow - 1, "P").Value, 1) Then
                    ' Flag this group as being in error
                    inError = True
                End If
            End If
        End If
    Else
        ' Highlight the group if there's been an error
        If inError Then Range(Cells(firstRow, "C"), Cells(thisRow - 1, "Q")).Interior.Color = vbYellow
        
        ' The new group is not in error - remember the row it started on
        inError = False
        firstRow = thisRow
    End If
    
    ' Check for invalid dates on this row
    If Trim(Cells(thisRow, "N").Value) <> "" _
    And Trim(Cells(thisRow, "O").Value) <> "" _
    And Trim(Cells(thisRow, "P").Value) <> "" _
    And Trim(Cells(thisRow, "Q").Value) <> "" Then
        If DateSerial(Cells(thisRow, "O").Value, Cells(thisRow, "N").Value, 1) > DateSerial(Cells(thisRow, "Q").Value, Cells(thisRow, "P").Value, 1) Then
            inError = True
        End If
    End If
Next thisRow

End Sub

WBD
 
Upvote 0
Success! Its only highlighted what I expected it to, I will try on more problems and let you know. Thank you so much for your time WBD.
 
Upvote 0
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