Categories
Technical
-- Database/SQL
-- Multimedia
-- Internet/Networking
-- Operating System
-- Programming
-- Security/Hacking
-- Science/Engineering
-- Web/HTML/CSS/Ajax
-- Unix/Linux
-- Windows
-- Mac OS X
-- Office
-- Perl/PHP/Python
-- C/C++/C#
-- .NET
-- Java
-- Hardware
-- Game Development
-- Embedded Systems
-- Graphics and Design
-- Network Programming
Study
Novel
Nonfiction
Health
Tutorial
Entertainment
Business
Magazine
Arts & Design
Audiobooks & Video Training
Cultures & Languages
Family & Home
Law & Politics
Lyrics & Music
Software Related
eBook Torrents
Uncategorized
-- Database/SQL
-- Multimedia
-- Internet/Networking
-- Operating System
-- Programming
-- Security/Hacking
-- Science/Engineering
-- Web/HTML/CSS/Ajax
-- Unix/Linux
-- Windows
-- Mac OS X
-- Office
-- Perl/PHP/Python
-- C/C++/C#
-- .NET
-- Java
-- Hardware
-- Game Development
-- Embedded Systems
-- Graphics and Design
-- Network Programming
Study
Novel
Nonfiction
Health
Tutorial
Entertainment
Business
Magazine
Arts & Design
Audiobooks & Video Training
Cultures & Languages
Family & Home
Law & Politics
Lyrics & Music
Software Related
eBook Torrents
Uncategorized
Share With Friends
Archive by Date
2012-08-06
2012-08-05
2012-08-04
2012-08-03
2012-08-02
2012-08-01
2012-07-31
2012-07-30
2012-07-29
2012-07-28
2012-08-05
2012-08-04
2012-08-03
2012-08-02
2012-08-01
2012-07-31
2012-07-30
2012-07-29
2012-07-28
Search Tag
Asanga
全唐诗
Oculos
stagione
Romantico
Fukai
FREDERICK
机械化
Sylphides
unlocking
BELLE
Eriboll
黎明
Sbiny
Hiragana
中国共产党
hybride
Ultrastructural
Glavasic
neutronique
nneberg
sensations
非金属
Marcos
Alpi
Antevil
国王
Comprar
sorpresa
战争论
Typu
AdoDB
Berle
Katherin
Swabia
Magzine
Varicose
chartisme
Vuelvo
Fashionable
Cockney
Serafini
USDM
Goldoni
Impieratrica
Tsuruga
Prestressed
Millan
Davitt
Dien
Newest
Database/SQL Database Modeling and Design, Fifth Edition: Logical Design, 5 edition
Database/SQL BusinessObjects: The Complete Reference
Database/SQL Free 15000000 ebooks,softwares,movies,wallpapers free download
Database/SQL Using SQLite
Database/SQL Professional SQL Server 2005 Reporting Services By Paul Turley
Database/SQL Microsoft(R) SQL Server(R) 2008 Administrator's Pocket Consultant
Database/SQL Rick Greenwald, "Beginning Oracle Application Express (Wrox Programmer to Programmer)"
Database/SQL 网页数据库整合精华录
Database/SQL Oracle 数据库培训手册—DBA
Database/SQL 数据库开发这点事(新)
Database/SQL SQLite数据库文件格式全面分析
Database/SQL SQLite入门与分析
Database/SQL SQLite权威指南
Database/SQL sqlite3使用详解
Database/SQL visual basic+sql server数据库应用开发
Database/SQL Microsoft Access Developer's Guide to SQL Server [Paperback]
Database/SQL Microsoft Access Developer\'s Guide to SQL Server
Database/SQL 数据库系统基础教程
Database/SQL SQL语言艺术
Database/SQL SQL Server 数据库设计与实现
Database/SQL BusinessObjects: The Complete Reference
Database/SQL Free 15000000 ebooks,softwares,movies,wallpapers free download
Database/SQL Using SQLite
Database/SQL Professional SQL Server 2005 Reporting Services By Paul Turley
Database/SQL Microsoft(R) SQL Server(R) 2008 Administrator's Pocket Consultant
Database/SQL Rick Greenwald, "Beginning Oracle Application Express (Wrox Programmer to Programmer)"
Database/SQL 网页数据库整合精华录
Database/SQL Oracle 数据库培训手册—DBA
Database/SQL 数据库开发这点事(新)
Database/SQL SQLite数据库文件格式全面分析
Database/SQL SQLite入门与分析
Database/SQL SQLite权威指南
Database/SQL sqlite3使用详解
Database/SQL visual basic+sql server数据库应用开发
Database/SQL Microsoft Access Developer's Guide to SQL Server [Paperback]
Database/SQL Microsoft Access Developer\'s Guide to SQL Server
Database/SQL 数据库系统基础教程
Database/SQL SQL语言艺术
Database/SQL SQL Server 数据库设计与实现
Useful Links
Database/SQL oracle9i优化器介绍
Posted on 2010-07-27
|
优化器产生的执行计划会因“优化器目标”的不同而不同。如果以最佳吞吐量为目标,
结果更倾向于使用全表扫描而不是索引扫描,或者使用排序合并连接而不是嵌套循环连接;如果以最快的响应速度为目标,其结果则通常倾向于使用索引扫描和嵌套循环连接。 例如,假使你有一个语句既能运行于嵌套循环连接又能运行于排序合并连接,排序合并连接能够较快的返回全部查询结果,而嵌套循环能快速的返回第一行或前面少数行结果。如果你是以提高吞吐量为优化器目标,优化器就会倾向于选择排序合并连接;如果你的优化器目标是提高响应速度,则优化器倾向于选择嵌套循环连接。
Rating:
2.5 out of 5 by Book123 |
Download Links | |
Server | Status |
---|---|
Direct Download Link 1 | Alive |
Direct Download Link 2 | Alive |
Download Link 1 | Alive |
Buy This Book at Best Price >> |
Like this article?! Give us +1: