Is there a way to combine datasets and return only the rows from one that DON'T match the other?

LizWall

Trying to create a dataset that will allow me to reconcile licensing -- reclaim licenses issued to people who no longer work at the company. I've got an All Associates file (spreadsheet A) that I'd like to bump up against a file that includes everyone who's been issued a license (spreadsheet B). Both have the same unique identifier. How do I get only the rows from B that are NOT in A?

Godzilla

you can use Magic ETL to join the two datasets (using an outer join). After you join the datasets, you can add a data filter and set the unique identifier from spreadsheet A to 'is null'.