Re: Is SQL silly as an RDBMS<->app interface?
От | Ron Johnson |
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Тема | Re: Is SQL silly as an RDBMS<->app interface? |
Дата | |
Msg-id | 1058162095.19794.127.camel@haggis обсуждение исходный текст |
Ответ на | Re: Is SQL silly as an RDBMS<->app interface? (nolan@celery.tssi.com) |
Ответы |
Re: Is SQL silly as an RDBMS<->app interface?
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Список | pgsql-general |
On Sun, 2003-07-13 at 10:17, nolan@celery.tssi.com wrote: > > I understand that SQL is the interface between apps and RDBMS's because > > of history, not because it is correct design. Could you point me to a > > link or book or paper that deals with this paradox? Thanks! > > I'm not sure what you mean by 'correct design'. > > I think you should go back and read the works of Codd and Date on the > development of relational databases. One point that was made early on is > that RDBMS theory doesn't guarantee efficiency, but it does guarantee SQL is only one possible relational query language. It didn't become de facto standard until the mid- to late-80s. It is an outgrowth of SEQEL (Structured English QuEry Language), which was IBM's 1st try at a descriptive query language. DEC had RDML (Relational Data Manipulation Language) to access it's RDBMS. I'm sure that Burroughs, etc, had their own access methods, too. -- +-----------------------------------------------------------+ | Ron Johnson, Jr. Home: ron.l.johnson@cox.net | | Jefferson, LA USA http://members.cox.net/ron.l.johnson | | | | 4 degrees from Vladimir Putin +-----------------------------------------------------------+
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