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Unable to generate unique values using AdvancedFilter

Posted on 2014-08-24
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Last Modified: 2014-08-24
Hi

try as I might, it seems impossible to make Excel FULLY produce a unique filter product. If I do this :

For q = 1 To livecolumns
    
    Sheet5.Columns(q).Copy Destination:=WS.Columns(1) 
        
    WS.Columns(1).AdvancedFilter Action:=xlFilterInPlace, Unique:=True

    Sheet5.Columns(q).Clear   

    WS.Columns(1).SpecialCells(xlCellTypeVisible).Copy Destination:=Sheet5.Columns(q)

     WS.ShowAllData 

     WS.Columns(1).Clear 
         

Next

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this takes columns in the first sheet (Sheet5) and copies them one at a time to sheet WS. WS then applies the filter, and copies the visible cells back to the already-cleared column in Sheet5. WS is then cleared, ready for the next incoming column of data.

But if a set of values has two identical values contiguous - ie in one cell below the other - then the filter does not get rid of one of them - although it works on the rest of the column's values, and does produce a list of uniques. Nothing I have tried has been able to work around this. Any ideas greatly appreciated.

(PS If you are an expert wondering when I am going to close my other Excel Q, it is open because until I get this present problem solved, I cannot get to move the sheet up to Excel 2013.)
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Question by:krakatoa
2 Comments
 
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Accepted Solution

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byundt earned 2000 total points
ID: 40281716
Advanced Filter requires that the first row of data be header labels. If you try running the Advanced Filter manually, you'll get a warning message if Excel can't recognize the first row as being header labels.

One approach is to create two separate ranges, the second of which excludes the header row. After applying Advanced Filter to the first range, I copy the second range (i.e. visible cells excluding the header row) to a separate sheet.
 
Another approach is to use the Advanced Filter to put the results directly on the other sheet. I then create a range variable that excludes the first row of that results range (it always copies the header label), and use that to import the uniques into VBA or a Data Validation dropdown.

From the code snippet you posted, the first approach seems more appropriate. You don't need to use the SpecialCells(xlCellTypeVisible), however.

Sub FilterMe()
    
Dim WS As Worksheet
Dim rgData As Range, rgFiltered As Range
Dim q As Long

q = 1
Set WS = ActiveSheet
Set rgData = WS.Range("A1")
Set rgData = Range(rgData, WS.Cells(WS.Rows.Count, rgData.Column).End(xlUp))
Set rgFiltered = rgData.Offset(1, 0).Resize(rgData.Rows.Count - 1, 1)

rgData.AdvancedFilter Action:=xlFilterInPlace, Unique:=True

rgFiltered.Copy Destination:=Sheet5.Cells(1, q)

WS.ShowAllData
         

End Sub

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LVL 17

Author Closing Comment

by:krakatoa
ID: 40281774
Oueff! Wow thanks!
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