> > Rich, could you please elaborate on SQL queries being based on sets? > I > never thought of it that way, and would like to hear your related > thoughts. > When Codd & Date elaborated the relational model, it was based on set theory. You have sets of data. Is there a relationship between them? If so, how do you express it? SQL came to exist. My two cents. > SteveT > > Steve Litt > Spring 2021 featured book: Troubleshooting Techniques of the > Successful > Technologist http://www.troubleshooters.com/techniques > >
