Could someone help me with this formula:
arrayformula(TEXTJOIN(", ",TRUE,unique(IF(Sheet1!$A:$A=A2,Sheet1!$B:$B,""))))
So basically, I've got the name of Merchants in 'Sheet1'!$A:$A
and the name of the Campaign Name Period they're working on in 'Sheet1'!$B:$B
I want to generate the merged Campaign Name Period, I want to make this line above to work with another arrayformula so I don't have to copy this formula to all cells in the column, I've tried to make it like this.
arrayformula(arrayformula(TEXTJOIN(", ",TRUE,unique(IF('Sheet1!$A:$A=$A2:$A,Sheet1!$B:$B,"")))))
but still, it won't work, it gives me this "Error Array arguments to EQ are of different size."