De-duplication across multiple columns using VBA

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SHaun687

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Apr 18, 2017
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7
Hi,

I am new to VBA and have been trying to right some code that will automate the formatting of some semi-structured data. The big issue I have is with de-duplication. I am trying de duplicate data based on one column and merge additional columns onto one row. For example (simplified data)


-- removed inline image ---


Becomes


-- removed inline image ---


I know I am probably going to have to assign values to the blanks in column A to stop blanks being seen as duplicates. The main problem I have with any code to date is that when the first row in column B, C or D is blank, no data is returned. For example in the above, "Name 1" would show as Name1, X, Blank, Blank.

Any help would be much appreciated! Thanks in advance.
 

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Sorry - image did not attach!

Hi,

I am new to <acronym title="visual basic for applications">VBA</acronym> and have been trying to right some code that will automate the formatting of some semi-structured data. The big issue I have is with de-duplication. I am trying de duplicate data based on one column and merge additional columns onto one row. For example (simplified data)

[TABLE="class: grid, width: 500"]
<tbody>[TR]
[TD]A[/TD]
[TD]B[/TD]
[TD]C[/TD]
[TD]D[/TD]
[/TR]
[TR]
[TD]Name1[/TD]
[TD]X[/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Name1[/TD]
[TD][/TD]
[TD]Y[/TD]
[TD]3[/TD]
[/TR]
[TR]
[TD]Name1[/TD]
[TD]X[/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD]1[/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD]4[/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Name2[/TD]
[TD]Z[/TD]
[TD][/TD]
[TD]2[/TD]
[/TR]
[TR]
[TD]Name3[/TD]
[TD][/TD]
[TD]5[/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Name2[/TD]
[TD]Z[/TD]
[TD][/TD]
[TD][/TD]
[/TR]
</tbody>[/TABLE]

Becomes

[TABLE="class: grid, width: 500"]
<tbody>[TR]
[TD]A[/TD]
[TD]B[/TD]
[TD]C[/TD]
[TD]D[/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD]1[/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD]4[/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Name1[/TD]
[TD]X[/TD]
[TD]Y[/TD]
[TD]3[/TD]
[/TR]
[TR]
[TD]Name2[/TD]
[TD]Z[/TD]
[TD][/TD]
[TD]2[/TD]
[/TR]
[TR]
[TD]Name3[/TD]
[TD][/TD]
[TD]5[/TD]
[TD][/TD]
[/TR]
</tbody>[/TABLE]


I know I am probably going to have to assign values to the blanks in column A to stop blanks being seen as duplicates. The main problem I have with any code to date is that when the first row in column B, C or D is blank, no data is returned. For example in the above, "Name 1" would show as Name1, X, Blank, Blank.

Any help would be much appreciated! Thanks in advance.
 
Last edited by a moderator:
Upvote 0
Dear Shaun687.

ref the link
[h=3]https://www.mrexcel.com/forum/excel-questions/999447-unique-values-1-column.html[/h]
I hope this will be help to you.
 
Upvote 0
Hi vmjan02,

Thanks for your help - I've just realised my images were not included in the original post for some reason. What I am trying to do is as follows

Name1 A 5
Name1 A Z
Name1 5

Name2
Name2 B

Becomes
Name1 A 5 Z
Name2 B

So it is slightly different to just returning unique values as the values must still be assigned to a variable, in this case the "Name".

Kind regards
Shaun687
 
Upvote 0
Try this:-
Your data in columns "A to D"
Results start "F1".
Code: 
[COLOR="Navy"]Sub[/COLOR] MG18Apr55
[COLOR="Navy"]Dim[/COLOR] Rng [COLOR="Navy"]As[/COLOR] Range, Dn [COLOR="Navy"]As[/COLOR] Range, n [COLOR="Navy"]As[/COLOR] [COLOR="Navy"]Long,[/COLOR] K [COLOR="Navy"]As[/COLOR] Variant, R [COLOR="Navy"]As[/COLOR] Range, Ac [COLOR="Navy"]As[/COLOR] [COLOR="Navy"]Long[/COLOR]
[COLOR="Navy"]Dim[/COLOR] Dic  [COLOR="Navy"]As[/COLOR] Object, nDic [COLOR="Navy"]As[/COLOR] Object, nAc [COLOR="Navy"]As[/COLOR] [COLOR="Navy"]Long,[/COLOR] c [COLOR="Navy"]As[/COLOR] [COLOR="Navy"]Long[/COLOR]
[COLOR="Navy"]Set[/COLOR] Rng = Range(Range("A1"), Range("A" & Rows.Count).End(xlUp))
[COLOR="Navy"]Set[/COLOR] Dic = CreateObject("scripting.dictionary")
Dic.CompareMode = vbTextCompare
[COLOR="Navy"]For[/COLOR] [COLOR="Navy"]Each[/COLOR] Dn [COLOR="Navy"]In[/COLOR] Rng
    [COLOR="Navy"]If[/COLOR] Not IsEmpty(Dn.Value) [COLOR="Navy"]Then[/COLOR]
        [COLOR="Navy"]If[/COLOR] Not Dic.exists(Dn.Value) [COLOR="Navy"]Then[/COLOR]
            Dic.Add Dn.Value, Dn
        [COLOR="Navy"]Else[/COLOR]
            [COLOR="Navy"]Set[/COLOR] Dic(Dn.Value) = Union(Dic(Dn.Value), Dn)
        [COLOR="Navy"]End[/COLOR] If
    [COLOR="Navy"]End[/COLOR] If
[COLOR="Navy"]Next[/COLOR]
ReDim ray(1 To Rng.Count, 1 To 2)
[COLOR="Navy"]Set[/COLOR] nDic = CreateObject("scripting.dictionary")
nDic.CompareMode = vbTextCompare
[COLOR="Navy"]For[/COLOR] [COLOR="Navy"]Each[/COLOR] K [COLOR="Navy"]In[/COLOR] Dic.keys
    c = c + 1: nAc = 1
    ray(c, 1) = K
    [COLOR="Navy"]For[/COLOR] [COLOR="Navy"]Each[/COLOR] R [COLOR="Navy"]In[/COLOR] Dic(K)
        [COLOR="Navy"]For[/COLOR] Ac = 1 To 3
           [COLOR="Navy"]If[/COLOR] Not nDic.exists(R.Offset(, Ac).Value) And Not R.Offset(, Ac).Value = "" [COLOR="Navy"]Then[/COLOR]
               nAc = nAc + 1
               nDic.Add (R.Offset(, Ac).Value), Nothing
               [COLOR="Navy"]If[/COLOR] nAc > UBound(ray, 2) [COLOR="Navy"]Then[/COLOR] ReDim Preserve ray(1 To Rng.Count, 1 To UBound(ray, 2) + 1)
               ray(c, nAc) = R.Offset(, Ac).Value
           [COLOR="Navy"]End[/COLOR] If
       [COLOR="Navy"]Next[/COLOR] Ac
    [COLOR="Navy"]Next[/COLOR] R
[COLOR="Navy"]Next[/COLOR] K
Range("F1").Resize(c, UBound(ray, 2)).Value = ray
[COLOR="Navy"]End[/COLOR] [COLOR="Navy"]Sub[/COLOR]
Regards Mick
 
Last edited by a moderator:
Upvote 0
Hi Mick,

That's brilliant - thank you so much! Just one more question, how could I alter the above so that data remains in the column it was found. For example

Name1 X
Name1 Z

is returned as Name1 X Z as opposed to
Name1 X Z

No worries if this could end up being more hassle than it's worth as I can apply formatting at this stage rather than before the de-duplication. Your code has been of huge help thanks!
 
Upvote 0
Do you mean this:-
[TABLE="width: 144"]
<colgroup><col width="64" style="width: 48pt;" span="3"> <tbody>[TR]
[TD="class: xl63, width: 64, bgcolor: transparent"] This:-[/TD]
[TD="class: xl63, width: 64, bgcolor: transparent"] [/TD]
[TD="class: xl63, width: 64, bgcolor: transparent"] [/TD]
[/TR]
[TR]
[TD="class: xl64, bgcolor: transparent"]Name1[/TD]
[TD="class: xl63, bgcolor: transparent"]A[/TD]
[TD="class: xl63, bgcolor: transparent, align: right"]5[/TD]
[/TR]
[TR]
[TD="class: xl64, bgcolor: transparent"]Name1[/TD]
[TD="class: xl63, bgcolor: transparent"]A[/TD]
[TD="class: xl63, bgcolor: transparent"]Z[/TD]
[/TR]
[TR]
[TD="class: xl64, bgcolor: transparent"]Name1[/TD]
[TD="class: xl63, bgcolor: transparent, align: right"]5[/TD]
[TD="class: xl63, bgcolor: transparent"]k[/TD]
[/TR]
[TR]
[TD="class: xl63, bgcolor: transparent"] [/TD]
[TD="class: xl63, bgcolor: transparent"] [/TD]
[TD="class: xl63, bgcolor: transparent"] [/TD]
[/TR]
[TR]
[TD="class: xl65, bgcolor: transparent"]Returns this:-[/TD]
[TD="class: xl63, bgcolor: transparent"] [/TD]
[TD="class: xl63, bgcolor: transparent"] [/TD]
[/TR]
[TR]
[TD="class: xl64, bgcolor: transparent"]Name1[/TD]
[TD="class: xl63, bgcolor: transparent"]A, 5[/TD]
[TD="class: xl63, bgcolor: transparent"]Z, K[/TD]
[/TR]
</tbody>[/TABLE]

Or something else ???
 
Upvote 0
Yes pretty much that, although the data unfortunately contains a lot of blanks so likely to be more like the following (blank column deliberate)

[TABLE="class: grid, width: 200"]
<tbody>[TR]
[TD]This:-[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Name1[/TD]
[TD]A[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Name1[/TD]
[TD]A[/TD]
[TD]5[/TD]
[TD][/TD]
[TD]Z[/TD]
[/TR]
[TR]
[TD]Name1[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD]K[/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Returns:-[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Name1[/TD]
[TD]A[/TD]
[TD]5[/TD]
[TD][/TD]
[TD]Z,K[/TD]
[/TR]
</tbody>[/TABLE]

Hope that makes sense?
 
Upvote 0
Try this:-
Results now start column "K", alter wher shown shown.
As your example now shows 5 columns, I've changed the possible columns to 6, Change this where shown in code to suit.
Code: 
[COLOR="Navy"]Sub[/COLOR] MG18Apr06
[COLOR="Navy"]Dim[/COLOR] Rng [COLOR="Navy"]As[/COLOR] Range, Dn [COLOR="Navy"]As[/COLOR] Range, n [COLOR="Navy"]As[/COLOR] [COLOR="Navy"]Long,[/COLOR] K [COLOR="Navy"]As[/COLOR] Variant, R [COLOR="Navy"]As[/COLOR] Range, Ac [COLOR="Navy"]As[/COLOR] [COLOR="Navy"]Long[/COLOR]
[COLOR="Navy"]Dim[/COLOR] Dic  [COLOR="Navy"]As[/COLOR] Object, nDic [COLOR="Navy"]As[/COLOR] Object, nAc [COLOR="Navy"]As[/COLOR] [COLOR="Navy"]Long,[/COLOR] c [COLOR="Navy"]As[/COLOR] [COLOR="Navy"]Long[/COLOR]
[COLOR="Navy"]Set[/COLOR] Rng = Range(Range("A1"), Range("A" & Rows.Count).End(xlUp))
[COLOR="Navy"]Set[/COLOR] Dic = CreateObject("scripting.dictionary")
Dic.CompareMode = vbTextCompare
[COLOR="Navy"]For[/COLOR] [COLOR="Navy"]Each[/COLOR] Dn [COLOR="Navy"]In[/COLOR] Rng
    [COLOR="Navy"]If[/COLOR] Not IsEmpty(Dn.Value) [COLOR="Navy"]Then[/COLOR]
        [COLOR="Navy"]If[/COLOR] Not Dic.exists(Dn.Value) [COLOR="Navy"]Then[/COLOR]
            Dic.Add Dn.Value, Dn
        [COLOR="Navy"]Else[/COLOR]
            [COLOR="Navy"]Set[/COLOR] Dic(Dn.Value) = Union(Dic(Dn.Value), Dn)
        [COLOR="Navy"]End[/COLOR] If
    [COLOR="Navy"]End[/COLOR] If
[COLOR="Navy"]Next[/COLOR]
ReDim ray(1 To Rng.Count, 1 To 6) '[COLOR="Green"][B] Change this "6" (number of columns in Data) to suit[/B][/COLOR]
[COLOR="Navy"]Set[/COLOR] nDic = CreateObject("scripting.dictionary")
nDic.CompareMode = vbTextCompare
[COLOR="Navy"]For[/COLOR] [COLOR="Navy"]Each[/COLOR] K [COLOR="Navy"]In[/COLOR] Dic.keys
    c = c + 1
    ray(c, 1) = K
    [COLOR="Navy"]For[/COLOR] [COLOR="Navy"]Each[/COLOR] R [COLOR="Navy"]In[/COLOR] Dic(K)
        [COLOR="Navy"]For[/COLOR] Ac = 2 To UBound(ray, 2)
           [COLOR="Navy"]If[/COLOR] Not nDic.exists(R(, Ac).Value) And Not R(, Ac).Value = "" [COLOR="Navy"]Then[/COLOR]
               nDic.Add (R(, Ac).Value), Nothing
               ray(c, Ac) = ray(c, Ac) & IIf(ray(c, Ac) = _
               "", R(, Ac).Value, " ," & R(, Ac).Value)
           [COLOR="Navy"]End[/COLOR] If
       [COLOR="Navy"]Next[/COLOR] Ac
    [COLOR="Navy"]Next[/COLOR] R
[COLOR="Navy"]Next[/COLOR] K
'[COLOR="Green"][B]Change range "K" to suit[/B][/COLOR]
[COLOR="Navy"]With[/COLOR] Range("K1").Resize(c, UBound(ray, 2))
    .Value = ray
    .Columns.AutoFit
[COLOR="Navy"]End[/COLOR] [COLOR="Navy"]With[/COLOR]
[COLOR="Navy"]End[/COLOR] [COLOR="Navy"]Sub[/COLOR]
Regards Mick
 
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