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Chris Date's Introduction to SQL [1], or Edgar Codd's last book [2].

Actually both are worth reading to discuss differences in philosophy (e.g. "no NULLs" vs 4-valued logic including "unknown" and "not applicable" NULLs).

[1] https://www.amazon.com/Introduction-SQL-Mastering-Relational...

[2] https://www.amazon.com/Relational-Model-Database-Management-...

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First book [1] is not by C. J. Date. So, is this the book you recommend and just mixed up the author's name, or... ?

Good catch. Too late to edit the comment.

Yes, I meant C.J. Date's "Introduction to SQL".

I was trying to get a link to the latest edition which appeared to be the 2nd link on an Amazon search for "Date introduction to SQL"... anyway, it is continuously edited so it's worth seeking the latest version which has twice as many pages as some of the earlier ones.

The thing is, and I probably should have pointed it out in the first comment, sorry about that: I can't find such a book by Cris Date. My guess is you meant "Introduction to Database Systems".

Yes, you are right. Database Systems.

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