Re: Date's First Great Blunder

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> One of the strengths of relational is that "all queries are equal" - the
> database is optimised so that you can ask any question with equal ease.
> By their very nature, hierarchical databases are best with queries whose
> structure matches the structure of the database.

Even in the relational model/DBMS world not "all queries are equal".

The LOGICAL STRUCTURE of the database is optimised so that you can ask SOME questions with equal ease.

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