PO tables contains purchase orders and date of the purchase. Performance table is created to track various metrics and do calculations. The data in performance table is grouped by months that is the date period which is prepopulated by month and year (ex 072017
). In PO table, I dont know how related overhead expense was/is used to relate two tables. Any idea how is it implemented?
My guess is there was a table overhead expense which might be deleted or renamed after Dec 2016 and now I am not able to figure out how can i get the data for year 2017 as the relation between two tables is broken.