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    <p>This will output a list of all ID's that were found more than once and what sheets they were found in on a summary sheet:</p> <pre><code>Sub tgr() Const strIDCol As String = "A" Const lHeaderRow As Long = 1 Dim cllIDs As Collection Dim ws As Worksheet Dim IDCell As Range Dim arrUnqIDs(1 To 65000) As Variant Dim arrMatches(1 To 65000) As String Dim ResultIndex As Long Dim lUnqIDCount As Long Set cllIDs = New Collection For Each ws In ActiveWorkbook.Sheets With Range(ws.Cells(lHeaderRow + 1, strIDCol), ws.Cells(ws.Rows.Count, strIDCol).End(xlUp)) If .Row &gt; lHeaderRow Then For Each IDCell In .Cells On Error Resume Next cllIDs.Add IDCell.Text, LCase(IDCell.Text) On Error GoTo 0 If cllIDs.Count &gt; lUnqIDCount Then lUnqIDCount = cllIDs.Count arrUnqIDs(lUnqIDCount) = IDCell.Text arrMatches(lUnqIDCount) = ws.Name Else ResultIndex = WorksheetFunction.Match(IDCell.Text, arrUnqIDs, 0) arrMatches(ResultIndex) = arrMatches(ResultIndex) &amp; "|" &amp; ws.Name End If Next IDCell End If End With Next ws If lUnqIDCount &gt; 0 Then With Sheets.Add(Before:=ActiveWorkbook.Sheets(1)) With .Range("A1:B1") .Value = Array("Intersecting ID's", "Intersected in Sheets...") .Font.Bold = True End With .Range("A2").Resize(lUnqIDCount).Value = Application.Transpose(arrUnqIDs) .Range("B2").Resize(lUnqIDCount).Value = Application.Transpose(arrMatches) .UsedRange.AutoFilter 2, "&lt;&gt;*|*" .UsedRange.Offset(1).EntireRow.Delete .UsedRange.AutoFilter .Range("A1").CurrentRegion.EntireColumn.AutoFit End With End If Set cllIDs = Nothing Set ws = Nothing Set IDCell = Nothing Erase arrUnqIDs Erase arrMatches End Sub </code></pre>
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    1. POFind value intersections in multiple columns
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    1. COthat is a pretty swift solution. I just had to change the strIDCol value to "C" and get rid of the first two worksheets (which were not part of the comparison, but would have skewed the result) and presto: your code delivered me the answer I wanted! Thanks so much (I would give +1 for this answer, if only I had the reputation, but answer accepted!) I had never worked with (or heard of) collections before. This was educational as well as useful.
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    2. COYou're very welcome :)
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

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