Optimizacion SQL en Oracle : Una guia practica, detallada y completa sobre como implementar y explotar bases de datos Oracle de forma eficiente -Language: spanish
Language: Spanish
Published by CreateSpace Independent Publishing Platform, 2013
- Softcover
- New

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- Title
- Optimizacion SQL en Oracle : Una guia practica, detallada y completa sobre como implementar y explotar bases de datos Oracle de forma eficiente -Language: spanish
- Author
- Carreras, Javier Morales
- Publisher
- CreateSpace Independent Publishing Platform
- Publication year
- 2013
- Condition
- New
- Binding
- Soft cover
- Language
- Spanish
- ISBN 10
- 1479190241
- ISBN 13
- 9781479190249
- Illustrator
- Cuchillo, Rafa
Código SQL del libro y base de datos completa descargable gratuitamente en:
http://www.optimizacionsqlenoracle.com
¿En qué consiste el Bind Variable Peeking y por qué el plan de ejecución que se presenta no es el mismo que se ejecuta?, ¿por qué Oracle no está usando este o aquel índice?, ¿por qué las vistas materializadas, el particionamiento o el paralelismo han empeorado el rendimiento de la base de datos en vez de mejorarlo tal y como prometía la publicidad?, ¿es fiable el coste de los planes de ejecución?, ¿quién tiene la culpa de este producto cartesiano?
Hay mucha teoría y muchas horas de práctica detrás de las respuestas que ofrecemos a estas cuestiones. El motor Oracle es uno de los más completos (y complejos) que existen, pero un estudio en profundidad de sus componentes, sus estructuras y su arquitectura puede dar las claves para implementar SQL de forma eficiente y poder optimizar código ya escrito.
En este libro, además de intentar dar respuesta a las puntos anteriores, se describen con un gran número de ejemplos y casos prácticos resueltos, entre muchas otras cuestiones, las siguientes:
-Cómo usar eficientemente SQL Profiles, SQL Baselines, vistas materializadas y cómo validar sus capacidades de reescritura global sobre consultas, uso de variables bind y paquetes como DBMS_STATS, DBMS_SPM, etc.
-Cómo realizar el análisis y estudio de SQL ineficiente, incluyendo trucos y técnicas para desmenuzar las operaciones internas de sus ejecuciones.
-Un estudio a fondo sobre el optimizador y sus comportamientos, así como los principales parámetros que afectan a la ejecución de código SQL.
-Uso de funciones analíticas, control de las ordenaciones implícitas, del impacto en el rendimiento por el uso recursivo de funciones o un diseño físico inadecuado.
-Cómo las estimaciones de cardinalidad y selectividad en el uso de índices o métodos de combinación concretos afectan a las decisiones del optimizador.
Además, se incluye un glosario de hints exhaustivo y completo, en el que se ilustran las casuísticas de cada caso con ejemplos de su uso y su consiguiente efecto en los tiempos de ejecución.
En resumen, este libro recoge todos los aspectos relativos al rendimiento, útiles tanto para desarrolladores como para administradores, y supone una guía básica para entender qué ocurre en el interior de la base de datos y cómo conseguir que la ejecución de SQL sea óptima.
"Synopsis" may belong to another edition of this title.
About the Author
En 2002 se certificó en Administración Oracle obteniendo la titulación OCP y desde entonces ha impartido formación y realizado proyectos de consultoría basados exclusivamente en bases de datos Oracle desde versiones Oracle8 hasta Oracle11g.
Ha publicado articulos en CUORE (Círculo de Usuarios de Oracle España) y participado en ponencias tecnológicas sobre plataformas Oracle.
Actualmente es administrador de bases de datos Oracle para la Generalitat Valenciana y publica artículos prácticos de desarrollo y administración de bases de datos Oracle en su blog http://oraclexperto.blogspot.com
"About the title" may belong to another edition of this title.
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