Re: Extending my question. Was: The relational model and relational algebra - why did SQL become the industry standard?
Date: Fri, 14 Mar 2003 00:42:55 +0200
Message-ID: <3E71096F.7030906_at_atbusiness.com>
Bob,
thanks for your clarifications and I agree with everything you say, esp.
regarding Hoares article. It has amazing insight and it is superbly
written.
And thanks for "defending" my analogy GOTO's<--->Duplicates.
One (minor) point though: I believe that NULLs and duplicates did not
result from a mad rush to get something into the SQL-standard, but
were very deliberate and conscious design decisions made in the
mid 70's.
Personally the "set" issue seems to me so clear that I have a hard time figuring out how respected DB-scientists can come to other conclusions. My theory is that (DB-) scientists don't really understand application development of just plain old "stupid" commercial systems, that, after all are what databases are mainly (=99%) used for. And everything that can be done to automate that environment is worth it's weight in gold. The absence of this understanding somehow distorts their view and prevents them from seeing the obvious.
regards,
Lauri Pietarinen
Received on Thu Mar 13 2003 - 23:42:55 CET