EXCEPT uses the same format as INTERSECT, but outputs only the records that are not in the latter table.
As with the other topics we’ve covered in this series, there is a wealth of information available on the topic of sets, databases, and SQL.
Check out this great read on Set Theory and SQL: “SQL-99 Complete, Really”, by Peter Guzman & Trudy Pelzer hosted on MariaDB
The link above contains more than just UNION, INTERSECT and EXCEPT, but there is a section towards the end that applies those operations to the larger discussion. This is a wonderful article!
Other good reads about Set Operations include:
Union and Union All:
See all of the SQL used in Querying Relational Databases in the Querying Relational Databases Cheat Sheet.
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