Need help with TEXTJOIN for Unique Values

[skushner]

Need some help changing the following formula to only grab unique values:

{=TEXTJOIN(",",TRUE,IF($A$2:$A$20000=A2,$C$2:$C$20000,""))}

Here's an example of the data (the last column is where this formula goes for each row:

Part Number	Project	Project Parent	TEXTJOIN
961344	W13-1	W13	W13
1001156	A36-1	A36	A36,A36
1001156	A36-2	A36	A36,A36
1001521	P21-1	P21	P21,P21
1001521	P21-2	P21	P21,P21
1023070	A32-3	A32	A32,L11,L20,L8
1023070	L11-1	L11	A32,L11,L20,L8
1023070	L20-1	L20	A32,L11,L20,L8
1023070	L8-1	L8	A32,L11,L20,L8
1023435	L17-1	L17	L17,L17
1023435	L17-2	L17	L17,L17

<colgroup><col><col><col><col></colgroup><tbody>
</tbody>

I'm trying to get rid of the bolded instances where it shows the same project parent twice (like P21, P21) and only show it once so each value after the comma is unique.
I really don't want to use VBA for this because it will be an ongoing report so i'd rather use formulas that I can copy/paste if possible.

If someone could help me with this i'd really appreciate it!!

 

[Domenic]

Try...

D2, confirmed with CONTROL+SHIFT+ENTER, and copied down:

=TEXTJOIN(",",TRUE,IF(FREQUENCY(IF($A$2:$A$12=A2,MATCH(IF($A$2:$A$12=A2,$C$2:$C$12),IF($A$2:$A$12=A2,$C$2:$C$12),0)),ROW($A$2:$A$12)-ROW($A$2)+1)>0,$C$2:$C$12,""))

Hope this helps!

 

[skushner]

OMG Thank you soooo much! This works perfectly!!!