To find a list of things that did not happen, such as items that were not sold, given SaleItem and Item tables, use a query that includesGroup of answer choicesFROM SaleItem INNER JOIN ItemFROM SaleItem LEFT JOIN ItemFROM Item WHERE ItemID NOT IN $($SELECT ItemID FROM SaleItem$)$FROM SaleItem WHERE ItemID NOT IN $($SELECT ItemID FROM Item$)$FROM Item RIGHT JOIN SaleItem