codd

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RPG, PHP, and history

While thinking through some of the comments recorded here as part of our discussion of development languages and environments I finally figured out what PHP reminds me of: RPG. RPG [Report generator] started out in the IBM 360 world as a report formatting aid, but never really...

Tags: Application, PHP, IBM Corp., Codd, Productivity, Programming Languages, Software Development, Software/Web Development, Paul Murphy

Blog posts 2008-04-28

The relational mistake

The relational mistakeNot quiteA relation is a function between sets. Relations and sets are not synonymous, though a relation is a set. For example I take the set of all names and the set of all dates of birth and define a relation between them (note that this will give...

Tags: Storage, Databases, database, SQL-DBMS, Codd, data store

Discussion threads 2007-10-31

RDBMS Applications

The motivating idea behind Codd's relational model wasn't data storage at all. Shared data storage was, to him, merely a means to an end: efficient, easily developed and debugged, applications. Basically the problem he was responding to was the clumsiness of COBOL, the single user orientation of the batch...

Tags: Databases, Servers, RDBMS, database, System 38, Codd, RPG, client-server, storage

Blog posts 2006-06-07

Bright ideas, big wait on tech payback

Bright ideas, big wait on tech paybackPotential of many ideas still not realisedIn the article it was stated that Larry Ellison took Codd's ideas from IBM and implemented them. This isn't really the truth. Ellison took IBM's proposed implementation of Codd's ideas. We are still living with the consequences of...

Tags: Databases, Bright Ideas, tech payback, Codd, Oracle CRM, Oracle Corp.

Discussion threads 2005-03-24

Bright ideas, big wait on tech payback

Bright ideas, big wait on tech paybackYou missed Scientist/inventor UGYou forgot scientist UG who invented 'the burny thing hurt UG', but failed to profit from the next two hundred thousands of years of people profitting from HIS invention. And after he toiled so hard in his cave to make 'burny...

Tags: Handhelds, Processors, Codd, Scientist/inventor UG, Newton, handheld, Apple Inc.

Discussion threads 2005-03-22

Additional Resources

RPG, PHP, and history

RPG, PHP, and historyIf it works for you, use it - but it doesnt work for me.If it works for you, and especially if it has an elegant simplicity, then go for it.However,[i]So what's the model? simple: business applications are user interfaces to business data.[/i]I think that in many cases...

Tags: Scripting languages, Programming languages, Databases, RPG, PHP

Discussion threads 2008-04-28

40 IT failures caused by software bugs

40 IT failures caused by software bugsDangerous logical bugs in widely used productsA while back the Life Insurance company debited my account twice in the same month luckily I had enough money on the account cover it.A large US supermarket chain debited a large number of customers debit and credit...

Tags: Programming languages, Databases, information technology, SQL, software

Discussion threads 2007-10-01

Database vs. Application

Database vs. ApplicationA good summary of popular misconceptions about the relational modelWell done Murphy.You favour client serverA so-called table in SQL is in the relational model actually a relation variable. If you separate applications and the database in the way that it is traditionally done in a host language interface...

Tags: Storage, Databases, Servers, database, host language, relational model

Discussion threads 2007-08-09

Database vs. Application

One of the interesting design challenges facing the people supporting the IEED research effort discussed yesterday involves how much of the key applications to embed in the database design.In that particular case the answer will probably be "essentially none" because the instrument designers can tell us what the data streams...

Tags: Storage, Databases, Operating systems, Paul Murphy, database, Unix

Blog posts 2007-08-09

Is Relational Relevant?

Is Relational Relevant?We're doomed...Does no one care about data integrity anymore?Or systems based on sound mathematical principals?Good blog, BTW.Great Blog! I agree that MySQL is poised to grow here. We will figure outhow to manage the miss-match between the newer data/applications and the data store. The question is how to...

Tags: Programming languages, Databases, relational model, SQL, SAP AG, database

Discussion threads 2007-06-21

Another nail in the coffin for xBase? Microsoft ends Foxpro's commercial run

Another nail in the coffin for xBase? Microsoft ends Foxpro's commercial runThe good old days of ClipperIt makes sense, Dave is a "Clipper-head"!I must admit I lost a bit of interest when CA got their hands on it and Visual Objectified it.I wrote xBase application from Borland C++ using Sequitor...

Tags: Storage, Databases, C/C++, Programming languages, Microsoft Corp., xBase, database, CLIPPER

Discussion threads 2007-03-23

IBM says, you don't need no operating system

IBM says, you don't need no operating systemThat's not what I understood..That's what IBM is saying with its Open Client Offering. We will let you run Windows applications, Linux applications and very soon Macintosh applications in a single, seamless environment....Granted it is a press release and so real meat is...

Tags: Operating systems, UNIX, consulting, OS independence, IBM Corp., operating system, Linux

Discussion threads 2007-02-12

4GL Errors and Consequences

4GL Errors and ConsequencesFurther requirements1. Remove the cross platform requirements for the DBMS provider from the language. Cross platform capability should exist in the DBMS itself. From the user and programmer point of view the whole database should appear as a single logical database regardless of how it may be...

Tags: Databases, Operating systems, Event-driven, relation variable, database, DBMS

Discussion threads 2006-09-28

IBM plays XML card in effort to beat Oracle

IBM plays XML card in effort to beat OracleOh dear...This technology basically encourages hack developers who have not yet grokked that the relational model is the _only_ complete data model that's commercially available.XML has no referential integrity - any document can point to any other document. After reading IBM's...

Tags: XML, Oracle Corp., IBM Corp.

Discussion threads 2006-06-08

The meaning of "relational"

The meaning of "relational"Nice try, but not quite thereI would strongly recommend C. J. Date's "Database in Depth" for anyone interested in a very clear explanation of relational theory. Set theory is important of course but not, I think, as central as predicate logic; we are not just interested in...

Tags: Databases, Programming languages, Set Theory, theory, relational theory, SQL, MySQL

Discussion threads 2006-06-06

The meaning of 'relational'

A lot of talkback contributors and others have muttered about the general failure of most application developers to make full and effective use of relational technology in their work. My guess, however, is that not too many of these people would agree to the same set of assertions either about...

Tags: COBOL, data processing

Blog posts 2006-06-06

Queen honors iPod designer

Queen honors iPod designerA well-deserved honourIves single-handedly made Apple Computer not only relevant again but the most important leader in consumer technology. His radical designs have made Apple's products prestigious and accessible to anyone who wants one. Combined with the move to Unix in OS X (I'll bet he's...

Tags: Digital music, Digital media, Operating systems, Apple Inc., Edgar Codd, Alan Turing, Apple iPod

Discussion threads 2006-01-01

MySQL preps business upgrade

MySQL preps business upgradeGood For You!Long Overdue, but good for you! We've been waiting for 5.0 quite anxiously.Outstanding...The new feature set will greatly extend the usability of this product. While not nearly ready for terrabyte data centers or serious OLAP, mySQL is rapidly becoming a viable alternative in...

Tags: Programming languages, Databases, MySQL, SQL, DBMS

Discussion threads 2005-10-18

IBM Research turns 60

IBM Research turns 60Good on Bell & Parc!!!"And, unlike like the storied Bell Labs or Xerox PARC, IBM has striven to ensure that its research adds to the bottom line through enhanced products, services and intellectual property licensing."Well, that's a minus for IBM, in my book. First of all,...

Tags: DATA MANAGEMENT, Databases, IBM Corp.

Discussion threads 2005-10-11

Does Oracle have a demographics problem?

Does Oracle have a demographics problem?The usual reminderThat the proper alternative to Oracle is a DBMS that implements the relational model faithfully. As all the necessary knowledge is in the public domain it seems an admirable project for open source.Nice"...the predictable Microsoft bigots and the free thinkers..."So no one who...

Tags: Leadership, Strategy, Databases, IBM Corp., Paul, thinker, Oracle Corp., free thinker, open source, innovation, Microsoft Corp.

Discussion threads 2005-06-29