Database Technology Nulls Considered Harmful(1st Edition)
Authors:
Chris Date
In Stock: 2 Left
Shipment time
Expected shipping within 2 - 3 DaysPopular items with books
Total Price:
$0
Solution Manual Includes
Price:
$9.99
Book details
ISBN: 1634624769, 978-1634624763
Book publisher: Technics Publications
Book Price $0 : Essentially All Truly General Purpose Database Systems Today Are Based On The Relational Model Of Data. That Model Was Invented By E. F. (â??Tedâ?) Codd In The Late 1960s And Early 1970s, During His Employment At The IBM Research Laboratory In San Jose, California, And It Was Solidly Based On Conventional Two-valued Logic, 2VL. Unfortunately, Those Same General Purpose Database Systems Today All Use The Language SQL As Their User Languageâ??and SQL Is Based Not On 2VL But On Whatâ??s Called Three-valued Logic, 3VL, Instead, And Uses What Are Called Nulls To Represent Missing Information. In Fact, Codd Himself Subsequently Extended His Original Model To Support 3VL And Nulls As Well. (Actually, Basing SQL On 3VL And Adding 3VL To The Relational Model Seem To Have Occurred In Lockstep, As It Were. Certainly Both Developments Occurred At The Same Placeâ??the IBM San Jose Research Laboratoryâ??at More Or Less The Same Time.) But 3VL Is A Disastrously Bad Basis On Which To Build Databases, Or Database Applications, Or Database Languages. Itâ??s Bad Because 3VL Doesnâ??t Behave The Way Reality Behaves, Which Means That Results That 3VL Says Are Correct Are Often Not Correct In The Real World. Not Only That, But SQLâ??s Implementation Of 3VL Is Itself Incorrect In Places, Which Means It Effectively Adds Another Layer Of Wrong Answers On Top Of The First. Bottom Line: If You Have Nulls In Your Database, Youâ??re Getting Wrong Answers. This Book Explains This Issue In Detail. It Also Contains Numerous Practical Suggestions For Dealing With The Problem.
Popular Among Students
The Principals Guide To School Budgeting - 3rd Edition
Richard D. Sorenson
ISBN: 1506389457, 978-1506389455
$0 $46.00
Organizational Behavior And Management In Law Enforcement - 2nd Edition
Harry W. More
ISBN: 0131181017, 9780131181014
$0 $8.43
Essentials Of Organizational Behaviour - 3rd Canadian Edition
Stephen P. RobbinsTimothy A. JudgeKatherine Breward
ISBN: 0137845723, 9780137845729
$0 $57.00
Super Study Guide Algorithms And Data Structures - 1st Edition
Afshine Amidi
ISBN: 979-8413681985
$0 $37.99
Sql And Relational Theory How To Write Accurate Sql Code - 3rd Edition
Chris Date
ISBN: 1491941170, 978-1491941171
$0 $21.95
Easy Learning Data Structures And Algorithms Go Graphically Learn Data Structures And Algorithms Better Than Before - 1st Edition
Yang Hu
ISBN: 979-8639690419
$0 $48.99
Data Structures Algorithms Essentials Common BIG O Time Complexity Basics With Real Life Implementation Solutions In C# - 1st Edition
Dr Solomon
ISBN: 1694641988, 978-1694641984
$0 $14.99
Datenstrukturen Fa 1/4r Linguistische Ressourcen Und Ihre Anwendungen Proceedings Der Gldv Fra 1/4hjahrstagung 2007 - 1st Edition
Na
ISBN: 382336314X, 978-3823363149
$0 $55.00
Linear Programming Foundations And Extensions - 3rd Edition
Robert J Vanderbei
ISBN: 1441944974, 978-1441944979
$113.4 $162.00
The Power Of Student Teams Achieving Social Emotional And Cognitive Learning In Every Classroom Through Academic Teaming - 1st Edition
Michael D Toth
ISBN: 1943920656, 978-1943920655
$0 $15.09
Artificial Superintelligence Coordination And Strategy - 1st Edition
Roman V Yampolskiy
ISBN: 3039218549, 978-3039218547
$0 $51.66Recommended For You
Pokamon Omega Ruby And Pokamon Alpha Sapphire The Official Hoenn Region Strategy Guide - 1st Edition
Pokemon Company International
ISBN: 1101898208, 978-1101898208
$0 $16.16
Advanced Java Ee Development For Rational Application Developer 7 5 Developers Guidebook - 1st Edition
Robert Mcchesney
ISBN: 1931182310, 978-1931182317
$0 $63.96
View Updating And Relational Theory Solving The View Update Problem - 1st Edition
Chris Date
ISBN: 1449357849, 978-1449357849
$0 $14.69
Fifty Years Of Relational And Other Database Writings - 1st Edition
Chris Date
ISBN: 1634628322, 978-1634628327
$0 $32.85
Domains And Types In Relational Theory And Sql Shedding Some Light On A Widely Misunderstood Concept - 1st Edition
Chris Date
ISBN: 1634625447, 978-1634625449
$0 $27.38
Stating The Obvious And Other Database Writings - 1st Edition
Chris Date
ISBN: 1634629035, 978-1634629034
$0 $33.05
Type Inheritance And Relational Theory Subtypes Supertypes And Substitutability - 1st Edition
Chris Date
ISBN: 1491959991, 978-1491959992
$0 $25.00
Practical Algorithms For 3d Computer Graphics - 2nd Edition
R. Stuart Ferguson
ISBN: 1466582529, 978-1466582521
$161 $230.00
Introducing Algorithms In C A Step By Step Guide To Algorithms In C - 1st Edition
Luciano Manelli
ISBN: 1484256220, 978-1484256220
$0 $26.17
Microsoft Access 2003 Nociones Para El Nivel Basico E Intermedio - 1st Edition
Clara Varela Comesana
ISBN: 8493459461, 978-8493459468
$0 $45.74
Complete Idiots Guide To Buying Computer - 1st Edition
Gralla
ISBN: 0789717999, 978-0789717993
$0 $8.64