?
Solved

Excel VBA 2010 - how to create a single dimension with unique values array from table column

Posted on 2014-02-10
3
Medium Priority
?
2,285 Views
Last Modified: 2014-02-11
I have a workbook that has a defined table on a sheet.  I want to get the unique values from one of the columns in the table and put those unique values in an array so I can loop over them.  A blank value should count as a unique value.   How can this be accomplished? My table name is T_201311 and the column name is EnterpriseID.
0
Comment
Question by:mamuscia
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
3 Comments
 
LVL 81

Expert Comment

by:byundt
ID: 39848915
The easiest way to get a list of unique values is using Advanced Filter on that column and writing the unique results to a worksheet range. Here is a code snippet that uses that method to put the unique values in an empty column to the right of the used range. As written, it hides that column and creates a named range that points to the list of unique items (excluding header).
    Set rg = .UsedRange
    Set rg = rg.Cells(1, 1).Offset(0, rg.Columns.Count + 1)
    .Range("A6").CurrentRegion.Columns(1).AdvancedFilter xlFilterCopy, , CopyToRange:=rg, Unique:=True
    Set rg = rg.CurrentRegion
    Set rg = rg.Offset(1, 0).Resize(rg.Rows.Count - 1)
    rg.EntireColumn.Hidden = True

Open in new window


Another way to do it is to create a dictionary object, which doesn't tolerate duplicates.
0
 
LVL 81

Accepted Solution

by:
byundt earned 2000 total points
ID: 39848956
Here is a sub & function using the Scripting Dictionary collection to make a list of the unique values in your table. The function returns the unique items in an array.

Note that I set a reference to "Microsoft Scripting Runtime" by checking its box in the Tools...Reference menu item.
Function Uniques(sTableName As String, sColumnName As String) As Variant
Dim dic As Scripting.Dictionary
Dim i As Long, n As Long
Dim v As Variant, vData As Variant, vResults As Variant
Dim tbl As ListObject
Dim col As ListColumn
Set dic = CreateObject("Scripting.Dictionary")
With ActiveSheet
    Set tbl = .ListObjects(sTableName)
    Set col = tbl.ListColumns(sColumnName)
    vData = col.DataBodyRange.Value
End With
On Error Resume Next
For Each v In vData
    dic.Add v, v
Next
On Error GoTo 0
    n = dic.Count
ReDim vResults(1 To n)
For i = 1 To n
    vResults(i) = dic.Items(i - 1)
Next
Uniques = vResults
End Function

Sub Test()
Dim v As Variant
v = Uniques("T_201311", "EnterpriseID")
Range("Q1").Resize(UBound(v)).Value = Application.Transpose(v)
End Sub

Open in new window

0
 

Author Closing Comment

by:mamuscia
ID: 39850071
thanks. this works and gives me the array I wanted.
0

Featured Post

Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This code takes an Excel list of URL’s and adds a header titled “URL List”. It then searches through all URL’s in column “A”, looking for duplicates. When a duplicate is found, it is moved to the top of the list. The duplicate URL’s are then highlig…
With User Account Control (UAC) enabled in Windows 7, one needs to open an elevated Command Prompt in order to run scripts under administrative privileges. Although the elevated Command Prompt accomplishes the task, the question How to run as script…
This Micro Tutorial demonstrates in Microsoft Excel how to consolidate your marketing data by creating an interactive charts using form controls. This creates cool drop-downs for viewers of your chart to choose from.
This Micro Tutorial will demonstrate how to use a scrolling table in Microsoft Excel using the INDEX function.

764 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question