Cost-Based Oracle Fundamentals (Expert's Voice in Oracle) (Volume 0)

Jonathan Lewis

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Lingua: inglese

Editore: APress, United States, New York, 2005

1590596366 / 9781590596364

Da: WorldofBooks, Goring-By-Sea, WS, Regno UnitoWorldofBooks

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Venditore AbeBooks dal 16 marzo 2007

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Descrizione dell’articolo da parte del venditore

The question, "Why isn't Oracle using my index?" must be one of the most popular (or perhaps unpopular) questions ever asked on the Oracle help forums. You've picked exactly the right columns, you've got them in the ideal order, you've computed statistics, you've checked for null columnsand the optimizer flatly refuses to use your index unless you hint it. What could possibly be going wrong? If you've suffered the frustration of watching the optimizer do something completely bizarre when the best execution plan is totally obvious, or spent hours or days trying to make the optimizer do what you want it to do, then this is the book you need. You'll come to know how the optimizer thinks, understand why it makes mistakes, and recognize the data patterns that make it go awry. With this information at your fingertips, you will save an enormous amount of time on designing and trouble-shooting your SQL. The cost-based optimizer is simply a piece of code that contains a model of how Oracle databases work. By applying this model to the statistics about your data, the optimizer tries to efficiently convert your query into an executable plan. Unfortunately, the model can't be perfect, your statistics can't be perfect, and the resulting execution plan may be far from perfect. In Cost-Based Oracle Fundamentals, the first book in a series of three, Jonathan Lewisone of the foremost authorities in this fielddescribes the most commonly used parts of the model, what the optimizer does with your statistics, and why things go wrong. With this information, you'll be in a position to fix entire problem areas, not just single SQL statements, by adjusting the model or creating more truthful statistics. The book has been read, but is in excellent condition. Pages are intact and not marred by notes or highlighting. The spine remains undamaged.…

Codice articolo GOR005597101

Titolo
Cost-Based Oracle Fundamentals (Expert's Voice in Oracle) (Volume 0)
Autore
Jonathan Lewis
Editore
APress, United States, New York
Anno di pubblicazione
2005
Condizione
Very Good
Rilegatura
Paperback
Lingua
inglese
ISBN 10
1590596366
ISBN 13
9781590596364
Peso dell'articolo
1129 grammi
Dimensioni
178.0 x 235.0

WorldofBooks

Goring-By-Sea, WS, Regno Unito

Venditore con 5 stelle

Venditore AbeBooks dal 16 marzo 2007

Tariffe di spedizione da Regno Unito a U.S.A.

ArticoloDa 7 a 12 giorni lavorativiDa 5 a 9 giorni lavorativi
Primo articoloEUR 6,63EUR 14,20
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