Hi looking for help on a formula
I want to have cells A2 - A403 that have the EXACT 'numbers' in them. (duplicates)
Then the duplicates I want to take the information from their 'J column'
and then concatenate the data into column L
I am getting stuck working out the formula please advise
In L2 it could be
=LET(colA, $A$2:$A$403, colJ, $J$2:$J$403, TEXTJOIN(", ",1,FILTER(colJ,A2=colA)))
and drag it down