Hi,
For decades, people have debated in comp.databases.theory and elsewhere
how
a 'relational database' should be defined.
Codd's original 1970 paper sketches the relational algebra as a query
language of a relational database, though Codd is not very precise about
what the query language
Begging to differ, no vendor that I'm aware of claims to be compliant with
a
paper or textbook. They tend to comply with an adopted standard such as:
ANSI/ISO/IEC 9075-1(through 5):1999
ISO/IEC 9075-1(through 5):1999
Yes, a strange thing too IMHO. The SQL standard defines a so-called
I tend to agree with the past two posts that mysql is in fact relational,
and would like to add that if we are going to make blanket statements that
something IS or IS NOT that we qualify our responses. personlly i would
like to know why Martijn views it as being a non relational db, without
Hi,
If you are trying to determine whether MySQL is a relational database,
the answer is yes.
Ehm... the answer is no.
It's getting better, that's for sure.
MySQL may or may not conform to some standard or another, and it may
or may not perform the tasks that you, personally, want it
a question...
is any DB that complies to the Relational Algebra a Relational DB???
Saqib Ali
-
http://validate.sourceforge.net --- XHTML/HTML/DocBook Validator
On Tue, 28 Oct 2003 [EMAIL PROTECTED] wrote:
I tend to agree with the past two posts that mysql is in fact relational,
and
---BeginMessage---
Well, my database should be able to check some entry data and decide if these
data will be accepted or rejected in a table that records all the received data.
For example: I'll have a table 1 that contains a list of all the equipments that
can send information to the database.
-Original Message-
From: Saqib Ali [mailto:[EMAIL PROTECTED]
Sent: Tuesday, October 28, 2003 8:47 AM
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Subject: Re: Is MySQL Relational? (was: Foreigner keys in MySQL?)
a question...
is any DB that complies to the Relational
On Tue, 28 Oct 2003 11:56:54 -0800, Jon Frisby [EMAIL PROTECTED] wrote:
MySQL may or may not conform to some standard or another, and it may
or may not perform the tasks that you, personally, want it to, but
in fact it *is* a relational database, as opposed to a flat file or
an object database.
Ali [EMAIL PROTECTED]
Newsgroups: mailing.database.myodbc
Sent: Tuesday, October 28, 2003 10:10 PM
Subject: RE: Is MySQL Relational? (was: Foreigner keys in MySQL?)
so funtions that can be performed by relation algebra are a subset of the
functions performed by a relational database?
however
Senior Manager of Engineering
Applied Biosystems
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-Original Message-
From: Heikki Tuuri [mailto:[EMAIL PROTECTED]
Sent: Tuesday, October 28, 2003 12:29 PM
To: [EMAIL PROTECTED]
Subject: Re: Is MySQL Relational? (was: Foreigner keys in MySQL
so funtions that can be performed by relation algebra are a subset of the
functions performed by a relational database?
however isn't it required for a relational database to perform all the
functions of relation algebra?
Saqib, there are multiple relational algebras. No db fully implements
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