I suspect the article is about returning the contributing tables in a join as multiple relations... while not possible in SQL proper this is possible with store

I suspect the article is about returning the contributing tables in a join as multiple relations... while not possible in SQL proper this is possible with stored procedures (at least in T-SQL) https://stackoverflow.com/questions/40013747/return-multiple-datasets-from-sql-server-stored-procedure https://stackoverflow.com/questions/40013747/return-multiple...