I am working with multiple sites to see how often unique accounts transact at different locations.
I have 3 tables that are already related, one has the transaction date, location and account number. Another is a table of locations and different date ranges indicating construction and turnover. The third table is Primary key connecting the two together as they are from different sources.
I have been able to complete this on a small scale using countifs(account#,unique account,"transaction date" (index match to the table with location #'s and their respective construction dates >= and <= to constrain within the 12 month period. The format of this table would be an array where column axis is account #'s and Row axis is location #.
Does anyone have any ideas on how to create a formula that will populate the number of transactions that each account had at respective locations 12 months prior to construction and 12 months post?