ADDMISSINGITEMS
Adds combinations of items from multiple columns to a table if they do not already exist. The determination of which item combinations to add is based on referencing source columns which contain all the possible values for the columns.
To determine the combinations of items from different columns to evaluate: AutoExist is applied for columns within the same table while CrossJoin is applied across different tables.
The ADDMISSINGITEMS function will return BLANK values for the IsSubtotal columns of blank rows it adds.