Assuming you have two fields "DateSold" and "SalesAmount" with multiple
entries each day and you want total sales per day as your output.
Open a new select query on the QBE panel and add the two fields as columns
in the query.
Go to the menu and select "View"; "Totals". That will put a total row under
each of the Fields and both will be set to "GroupBy". Change the one under
SalesAmount from "GroupBy" to "SUM" using the dropdown list. Set the sort
row under "DateSold" to sort descending.
Open your query. It should show your daily Sales Totals from today back.