Delete filtered data based on date range - excel

Question

I'm looking to filter for blank cells in ColumnB which I've done below:
Dim f As Range
Set f = ActiveSheet.Rows(1)
f.AutoFilter _
Field:=2, _
Criteria1:="", _
VisibleDropdown:=True
From there I'd like to delete this data if the blank cells from the filter are between two specific dates.
The date range would be July 2019 to May 2020. So the condition would be 1 filter column b for blanks, then if column A and/or column c fall within the July 2019 - May 2020 date range then delete the filtered rows.
Thank you!

Answer 1

I don't know if there is a way to use built-in functions to get what you're looking for, but the following code will work. For a large number of rows this might take a while to run.
Public Sub cleanUp()
Dim sRow As Integer
Dim lRow As Integer
Dim rng As Excel.Range
sRow = 2 'set row where data starts
lRow = ThisWorkbook.Worksheets(1).Cells(1048576, 1).End(xlUp).Row 'find the last row of data
Set rng = ThisWorkbook.Worksheets(1).Cells(lRow, 2) 'start at the last row with data
For r = lRow To sRow Step -1 'work backwards to avoid skipping rows
With ThisWorkbook.Worksheets(1)
If .Cells(r, 2).Value = "" Then
'column B of row r was empty
If .Cells(r, 1).Value > 43647 And .Cells(r, 1).Value < 43982 Then
'column A of row r was between 1 July 2019 and 31 May 2020
'row should be deleted
.Rows(r).Delete
ElseIf .Cells(r, 3).Value > 43647 And .Cells(r, 1).Value < 43982 Then
'column C of row r was between 1 July 2019 and 31 May 2020
'row should be deleted
.Rows(r).Delete
Else
'dates in columns A and C did not match criteria
'do nothing
End If
Else
'column B of row r is not empty
'do nothing
End If
End With
Next r
End Sub

Answer 2

Within
Assumptions
The dates are dates, not strings.
Within July 2019 to May 2020 means 07/01/2019 00:00:00 <= n < 06/01/2020 00:00:00.
There is no data below the dataset.
Usage & Tips
Copy the complete code into a standard module, e.g. Module1.
Only run the first procedure (deleteWithin), the rest of them are being called by it, when necessary.
The constants are adjusted to your setup, but check them before running the code.
You should qualify the worksheet, probably the workbook, too. You would't want to run this code on the wrong worksheet.
Test the accuracy of the code first with Select (adjusted in deleteRows) and only afterwards change to Delete.
The Code
Option Explicit
Sub deleteWithin()
' Constants
Const FirstMMMMYYYY As String = "July 2019"
Const LastMMMMYYYY As String = "May 2020"
Const FirstRow As Long = 2 ' First Row of Data
Const Cols As String = "A:C" ' Address of All Columns
' The following 4 column numbers represent the n-th columns of 'Cols'.
Const LastRowColumn As Long = 1 ' Column to Calculate the Last Row
Const DateColumn1 As Long = 1 ' Column Containing the First Date.
Const DateColumn2 As Long = 3 ' Column Containing the Second Date.
Const CriteriaColumn As Long = 2 ' Column Containing the Criteria ("")
Const Criteria As String = ""
' Define Source Range ('rng').
Dim ws As Worksheet
Set ws = ActiveSheet
Dim rng As Range
Set rng = ws.Columns(LastRowColumn).Find("*", , xlFormulas, , , xlPrevious)
If rng Is Nothing Then
GoTo ProcExit
End If
If rng.Row < FirstRow Then
GoTo ProcExit
End If
Dim FirstColumn As Long
FirstColumn = ws.Columns(Cols).Column
Dim LastColumn As Long
LastColumn = FirstColumn + ws.Columns(Cols).Columns.Count - 1
Set rng = ws.Range(ws.Cells(FirstRow, FirstColumn), _
rng.Offset(, LastColumn - LastRowColumn))
' Write the numbers of the rows to delete to Data Rows Array ('DataRows').
' Write values from Source Range to Data Array ('Data').
Dim Data As Variant
Data = rng.Value
' Define Data Rows Array.
Dim DataRows As Variant
ReDim DataRows(1 To UBound(Data))
' Calculate Date Interval ('DateInterval').
Dim DateInterval As Variant
DateInterval = getDateInterval(FirstMMMMYYYY, LastMMMMYYYY)
' Declare additional variables to use in the following 'For Next' loop.
Dim FirstDate As Variant
Dim SecondDate As Variant
Dim i As Long
Dim k As Long
' Loop through rows of Data Array.
For i = 1 To UBound(Data)
' If Criteria is found then write row number to Data Rows Array.
If Data(i, CriteriaColumn) = Criteria Then
FirstDate = Data(i, DateColumn1)
SecondDate = Data(i, DateColumn2)
If fallsWithin(FirstDate, SecondDate, DateInterval) Then
k = k + 1
DataRows(k) = i + FirstRow - 1
Else
End If
End If
Next i
' Delete rows in worksheet.
' Check if at least once Criteria was found.
If k > 0 Then
' Resize Data Rows Array.
ReDim Preserve DataRows(1 To k)
' Delete rows in one go.
deleteRows ws, DataRows
MsgBox "Rows deleted."
Else
MsgBox "Nothing deleted."
End If
ProcExit:
End Sub
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
' Converts two strings in the format "MMMM YYYY" to dates and
' returns a 1D two-element array whose first element is less than
' the second element. The first element is to be tested with ">=", while
' the second element is to be tested with "<".
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
Function getDateInterval(ByVal FirstMMMMYYYY As String, _
ByVal SecondMMMMYYYY As String) _
As Variant
Dim MMMM As Variant
MMMM = Array("January", "February", "March", "April", "May", "June", _
"July", "August", "September", "October", "November", _
"December")
Dim First As Date
First = DateSerial(CLng(Split(FirstMMMMYYYY)(1)), _
Application.Match(Split(FirstMMMMYYYY)(0), MMMM, 0), _
1)
Dim Second As Date
Second = DateSerial(CLng(Split(SecondMMMMYYYY)(1)), _
Application.Match(Split(SecondMMMMYYYY)(0), MMMM, 0) _
+ 1, _
1)
If First < Second Then
getDateInterval = Array(First, Second)
Else
getDateInterval = Array(Second, First)
End If
End Function
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
' Returns 'True' if two values are within the values of an interval.
' The interval is a 1D two-element array and its first element
' is less than its second element. The first element is to be tested with ">=",
' while the second element is to be tested with "<".
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
Function fallsWithin(ByVal FirstValue As Variant, _
ByVal SecondValue As Variant, _
Interval As Variant) _
As Boolean
Dim StartValue As Variant
StartValue = Interval(LBound(Interval))
Dim EndValue As Variant
EndValue = Interval(UBound(Interval))
If FirstValue < SecondValue Then
If FirstValue >= StartValue And SecondValue < EndValue Then
fallsWithin = True
End If
Else
If SecondValue >= StartValue And FirstValue < EndValue Then
fallsWithin = True
End If
End If
ProcExit:
End Function
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
' Assumes that 'Sheet' is a valid worksheet and 'Data' is a 1D array
' containing at least one row number.
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
Sub deleteRows(Sheet As Worksheet, _
DataRows As Variant)
Dim rng As Range
Set rng = Sheet.Rows(DataRows(LBound(DataRows)))
If UBound(DataRows) - LBound(DataRows) > 0 Then
Dim j As Long
For j = LBound(DataRows) + 1 To UBound(DataRows)
' 'Collect' row ranges into one range.
Set rng = Union(rng, Sheet.Rows(DataRows(j)))
Next j
End If
' Delete rows in one go.
rng.Select ' Change to 'rng.Delete' when tested.
End Sub