Pro ActiveRecord for Ruby helps you take advantage of the full power of your database engine from within your Ruby programs and Rails applications. ActiveRecord, part of the magic that makes the Rails framework so powerful and easy to use, is the model element of Rails model/view/controller framework. Its an object-relational mapping library enabling you to interact with databases from both Ruby and Rails applications.

Because ActiveRecord is configured with default assumptions that mesh perfectly with the Rails framework, Rails developers often find they hardly need think about it at a more...

Trademarked names may appear in this book. Rather than use a trademark symbol with every occurrence of a trade-marked name, we use the names only in an editorial fashion and to the benefit of the trademark owner, with no
intention of infringement of the trademark.

Java™ and all Java-based marks are trademarks or registered trademarks of Sun Microsystems, Inc. in the US and other countries. Apress, Inc. is not affiliated with Sun Microsystems, Inc., and this book was written without endorsement from Sun Microsystems, Inc.

Lead Editor: Steve Anglin
Technical Reviewer: Matthew Foemmel
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Rails is a full-stack, open source web framework that enables you to create full-featured, sophisticated web-based applications, but with a twist... A full Rails application probably has less total code than the XML you'd need to configure the same application in other frameworks. With this book you'll learn how to use ActiveRecord to connect business objects and database tables.

No more painful object-relational mapping. Just create your business objects and let Rails do the rest.

You'll learn how to use the Action Pack framework to route incoming requests and render pages using more...

In just 24 lessons of one hour or less, you will be able to build dynamic Web sites using JavaServer Pages. Using a straightforward, step-by-step approach, each lesson builds on the previous ones, enabling you to learn the essentials of JavaServer Pages 2.0 from the ground up. The book includes Apache Tomcat, Sun's reference implementation of JSP, so you can start developing applications immediately.

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Oracle9i DBA JumpStart gives you the solid grounding you need to approach Oracle certification with confidence:

Introduction to relational database concepts
Using basic SQL *Plus and iSQL *Plus commands
Understanding Oracle database functions
Using multiple tables
Restricting, sorting, and grouping data
Creating and maintaining a database
Using SQL *Plus reporting techniques
Setting up users and managing security
Configuring optimization
Creating backups
Troubleshootingmore...

Learn about this open-source vulnerability scanner, how to get the most out of the tool, recognize its limitations and how to deal with them, and what makes it flexible to perform a wide range of network-based operations.
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This how-to guide provides step-by-step instructions for building a Beowulf-type computer, including the physical elements that make up a clustered PC, the software required, and insights on how to organize the code to exploit parallelism.

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This guide covers parts I & II of the Sun Certified System Administrator for Solaris 9 exams: 310-014 and 310-015 and provides in-depth coverage of all exam objectives along with practical insights drawn from real world experience.
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MySQL Can Do More, and Now You Need to Know More

MySQL has proved it can compete with the big names in database management, such as SQL Server and Oracle, and with MySQL 4 this is truer than ever. Mastering MySQL 4 is your one-stop resource for all the information you need to create, maintain, use, and extend a MySQL database. It's also essential reading for anyone developing database applications in a MySQL environment. If you're new to MySQL, this is a great way to get up and running--fast. If you're upgrading, it will help you get all you can out of new features and support. Coverag more...

System Performance Tuning answers one of the most fundamental questions you can ask about your computer: How can I get it to do more work without buying more hardware? In the current economic downturn, performance tuning takes on a new importance. It allows system administrators to make the best use of existing systems and minimize the purchase of new equipment. Well-tuned systems save money and time that would otherwise be wasted dealing with slowdowns and errors. Performance tuning always involves compromises; unless system administrators know what the compromises are, they can't make intel more...