Excel Count Unique Values From SUMPRODUCT

Question

I have a sheet that is supposed to count the number of unique reservations an agent has done. It currently counts duplicates though and I need to only count unique ones.

Here is the formula being used in the sheet:

=SUMPRODUCT((Table_Query_from_db[client_code]=$B7)*(Table_Query_from_db[created_date_time]>=D$1)*(Table_Query_from_db[created_date_time]<D$1+1))

This counts the number of lines/records that show up for a specific person ( $B7 ) for a specific date ( D$1 ).

Here is the sample of the sheet:

As you can see B7 contains the agents number and D1 contains the date.

Here is the dataset for that specific agent on that specific date:

There is indeed 5 reservations - but only 3 unique ones.

How do I go about getting D7 in the first picture to come out as 3 instead of 5?

Answer 1

Use this array formula:

=SUM(IF((Table_Query_from_db[client_code]=$B7)*(Table_Query_from_db[created_date_time]>=D$1)*(Table_Query_from_db[created_date_time]<D$1+1),1/COUNTIFS(Table_Query_from_db[reservation_number],Table_Query_from_db[reservation_number],Table_Query_from_db[client_code],$B7,Table_Query_from_db[created_date_time],">=" & D$1,Table_Query_from_db[created_date_time],"<" & D$1+1)))

Being an array formula it must be confirmed with Ctrl-Shift-Enter instead of Enter when exiting edit mode. If done correctly then Excel will put {} around the formula.