Comparing two cells with comma separated lists of values and returning any duplicates

[CellHell]

Easy one to explain, but frustrating to try and resolve!... 1 cell has '7,8,9', the next cell has '8,9,10' and I want it to compare and report the overlap '8,9'. I can't split these out into separate cells due to the spreadsheet size as each cell might contain upto 12 or so values and ideally I would be able to simultaneously compare 8 or so cells together with the same operation (although even comparing 2 with multiple values would be very useful). It would be ok to CONCAT all the values into one cell and then pull out the duplicates perhaps? ...If it also reported the number of overlapped ; so '2' for '8,9' that would be great but suspect I could find a way for that easier bit. Any help would be really greatly appreciated , to my mind this should be simple and quite a common comparison but lost on this one!....if I have to scrub up on VBA to resolve then so be it. Thanks for reading!

 

[CellHell]

Glad you sorted it & thanks for the feedback.

Sorry Fluff, I spoke too soon - I thought I had it!, but my solution results in a duplication of numbers; if comparing 3 cells it shows the answer for comparing each one against each other in turn - rather than the collective with duplicates removed;
e.g. my formula for comparing upto 12 or so individual non-adjacent cells;
=TEXTJOIN(",",,FILTERXML("<k><m>"&TEXTJOIN("</m><m>",,SUBSTITUTE(O277,",","</m><m>"),SUBSTITUTE(Q277,",","</m><m>"),SUBSTITUTE(S277,",","</m><m>"),SUBSTITUTE(U277,",","</m><m>"),SUBSTITUTE(W277,",","</m><m>"),SUBSTITUTE(Y277,",","</m><m>"),SUBSTITUTE(AA277,",","</m><m>"),SUBSTITUTE(AC277,",","</m><m>"),SUBSTITUTE(AE277,",","</m><m>"),SUBSTITUTE(AG277,",","</m><m>"),SUBSTITUTE(AI277,",","</m><m>"),SUBSTITUTE(AK277,",","</m><m>"))&"</m></k>","//m[.=following-sibling::m]"))

when there is;

5,6,7,8,9,10 in cell O

5,7,9,11,13 in cell Q

5,6,7,8,9,10 in cell S

this produces '5,6,7,8,9,10,5,7,9' rather than just '5,6,7,8,9,10' (as you probably know) . Nested substitute needed or something similar? . I know again this is me missing the obvious but I cannot fathom..As ever, any guidance much appreciated!.

 

[Fluff]

How about

=TEXTJOIN(",",,UNIQUE(FILTERXML("<k><m>"&SUBSTITUTE(TEXTJOIN(",",,O277,Q277,S277,U277,W277,Y277,AA277,AC277,AE277,AG277,AI277,AK277),",","</m><m>")&"</m></k>","//m[.=following-sibling::m]")))

 

[CellHell]

How about

=TEXTJOIN(",",,UNIQUE(FILTERXML("<k><m>"&SUBSTITUTE(TEXTJOIN(",",,O277,Q277,S277,U277,W277,Y277,AA277,AC277,AE277,AG277,AI277,AK277),",","</m><m>")&"</m></k>","//m[.=following-sibling::m]")))

that's it, far tidier and works to remove duplicates. thanks again.

 

[Fluff]

You're welcome & thanks for the feedback.