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Database Technology Nulls Considered by Date Chris (13 results)
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Database Technology: Nulls Considered Harmful
Published by Technics Publications, 2024
ISBN 10: 1634624769 ISBN 13: 9781634624763
Language: English
US$ 39.35
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Database Technology: Nulls Considered Harmful
Published by Technics Publications, 2024
ISBN 10: 1634624769 ISBN 13: 9781634624763
Language: English
Condition: New.
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Database Technology: Nulls Considered Harmful
Published by Technics Publications, 2024
ISBN 10: 1634624769 ISBN 13: 9781634624763
Language: English
Condition: New. SUPER FAST SHIPPING.
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Database Technology: Nulls Considered Harmful
Published by Technics Publications, 2024
ISBN 10: 1634624769 ISBN 13: 9781634624763
Language: English
US$ 40.88
Convert currencyUS$ 2.64 shipping within U.S.A.Quantity: Over 20 available
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Database Technology: Nulls Considered Harmful (Paperback or Softback)
Published by Technics Publications 7/8/2024, 2024
ISBN 10: 1634624769 ISBN 13: 9781634624763
Language: English
Paperback or Softback. Condition: New. Database Technology: Nulls Considered Harmful 0.95. Book.
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Database Technology: Nulls Considered Harmful
Published by Technics Publications, 2024
ISBN 10: 1634624769 ISBN 13: 9781634624763
Language: English
Condition: New.
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Database Technology: Nulls Considered Harmful
Published by Technics Publications, 2024
ISBN 10: 1634624769 ISBN 13: 9781634624763
Language: English
Seller: GreatBookPricesUK, Woodford Green, United Kingdom
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Database Technology: Nulls Considered Harmful
Published by Technics Publications, 2024
ISBN 10: 1634624769 ISBN 13: 9781634624763
Language: English
Seller: Ria Christie Collections, Uxbridge, United Kingdom
Seller rating 5 out of 5 stars
US$ 54.54
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Database Technology: Nulls Considered Harmful
Published by Technics Publications, 2024
ISBN 10: 1634624769 ISBN 13: 9781634624763
Language: English
Seller: GreatBookPricesUK, Woodford Green, United Kingdom
Seller rating 5 out of 5 stars
US$ 51.07
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Database Technology: Nulls Considered Harmful
Published by Technics Publications, 2024
ISBN 10: 1634624769 ISBN 13: 9781634624763
Language: English
Seller: THE SAINT BOOKSTORE, Southport, United Kingdom
Seller rating 5 out of 5 stars
US$ 52.05
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Database Technology: Nulls Considered Harmful
Published by Technics Publications, 2024
ISBN 10: 1634624769 ISBN 13: 9781634624763
Language: English
US$ 60.47
Convert currencyUS$ 8.74 shipping from United Kingdom to U.S.A.Quantity: 4 available
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Database Technology: Nulls Considered Harmful
Published by Technics Publications, 2024
ISBN 10: 1634624769 ISBN 13: 9781634624763
Language: English
US$ 66.69
Convert currencyUS$ 11.67 shipping from Germany to U.S.A.Quantity: 4 available
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Database Technology : Nulls Considered Harmful
Published by Technics Publications, 2024
ISBN 10: 1634624769 ISBN 13: 9781634624763
Language: English
US$ 61.11
Convert currencyUS$ 73.09 shipping from Germany to U.S.A.Quantity: 1 available
Add to basketTaschenbuch. Condition: Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - Essentially all truly general purpose database systems today are based on the relational model of data. That model was invented by E. F. ('Ted') 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 language-and SQL is based not on 2VL but on what'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 place-the IBM San Jose Research Laboratory-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.It's bad because 3VL doesn'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 SQL'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, you're getting wrong answers.This book explains this issue in detail. It also contains numerous practical suggestions for dealing with the problem.
