Free SQL books

Sams Teach Yourself SQL in 24 Hours
This is a free sql book from Sams Reference Library. Sams Teach Yourself SQL in 24 Hours, Third Edition presents the key features of SQL (Structured Query Language) in an easy to understand format with updated code examples, notes, diagrams, exercises, and quizzes. New material covers more information.

Backup and Recovery Best Practices for Microsoft SQL Server 2005

To help you choose from among the available configuration options and backup and recovery procedures, HP has conducted extensive laboratory tests to determine best practices. This paper discusses those test results so that users can understand the options and the limitations of implementing backup and recovery using Linear Tape-Open (LTO) tape, disk-to-disk, and virtual tape devices. The audience for this paper is HP users in an enterprise environment currently running or planning to run SQL Server 2005. (For visitors from USA only.)

High availability for SQL Server 2005

Array-based remote replication solutions for Microsoft SQL Server have existed for years, and SQL Server 2005 provides a built-in, host-based feature called database mirroring as an alternative for disaster-recovery solutions. Although these technologies are widely available, users may lack the information needed to select the replication, mirroring, or high availability method(s) suitable for their environment; they need information on how to configure the database, storage, and software. (For visitors from USA only.)

SQL for Web Nerds
This is a free online sql book by Philip Greenspun. It covers topics - data modeling, simple queries, complex queries, transactions, triggers, views, style, PL/SQL and Java, trees, handling dates in Oracle, limits in Oracle, tuning, data warehousing, foreign and legacy data and normalization.

Structured Query Language (SQL): a Practical Introduction
This is a good introductory text for learning SQL. There is no simpler text for learning the syntax and structure of SQL. Download it for free.

Sams Teach Yourself Microsoft SQL Server 7 in 21 Days
This is a free sql server book from Sams Reference Library. Sams Teach Yourself Microsoft SQL Server 7 in 21 Days gives you the new features and capabilities of SQL Server 7, in a tutorial environment.

Essential SQL
This is a bonus chapter provided with Mastering Delphi 6. It is a basic introduction to SQL.

Free Perl books

Beginning Perl
This free online perl book covers the following topics - Installing Perl on Windows and UNIX, Making use of online Perl resources like CPAN, First principles in programming and the Perl syntax, Working with files and databases, Writing web pages in Perl and Using Perl as an object-oriented language.

Perl 5 by Example
Reading Perl 5 by Example is the easiest way to learn Perl! Teach yourself Internet programming and CGI scripting. Topics covered - Basic Perl, Intermediate Perl, Advanced Perl and Perl and the Internet.

Perl for the Web
Perl for the Web is a free online perl book. Topics covered - The Problems, The Solutions and Planning For the Future.

Extreme Perl
Extreme Perl is a book about Extreme Programming using the programming language Perl. This free perl ebook can be downloaded in html and pdf formats.

Impatient Perl
This free perl book is for people who either want to learn perl or are already programming in perl and just don't have the patience to scrounge for information to learn and use perl. This document should also find use as a handy desk reference for some of the more common perl related questions.

Free Python books

Dive Into Python: Python from novice to pro
Dive Into Python: Python from novice to pro is a Python book for experienced programmers. It is a free python book by Mark Pilgrim. You can download it in various formats.

Text Processing in Python
Text Processing in Python by David Mertz is available in smart ASCII(text) format. The book contents are python basics, basic string operations, regular expressions, parsers and state-machines, internet tools and techniques, a selective and impressionistic short review of python, a data compression primer, understanding unicode, a state-machine for adding markup to text and glossary terms.

How to Think Like a Computer Scientist: Learning with Python
How to Think Like a Computer Scientist: Learning with Python by Allen Downey, Jeff Elkner and Chris Meyers can be download in various formats. How to Think Like a Computer Scientist: Learning with Python 2nd Edition.

Data Structures and Algorithms with Object-Oriented Design Patterns in Python
Data Structures and Algorithms with Object-Oriented Design Patterns in Python by Bruno R. Preiss.

Python Standard Library
Ideal for any working Python developer, Fredrik Lundh's Python Standard Library provides an excellent tour of some of the most important modules in today's Python 2.0 standard. Mixing sample code and plenty of expert advice, this title will be indispensable for programmers.

Free PHP books

The PHP Anthology: 101 Essential Tips, Tricks & Hacks, 2nd Edition
Free 207 Page eBook. The PHP Anthology will save you time, and eliminate the frustration of completing PHP tasks, with a comprehensive collection of ready-to-use solutions. If you're building web applications with PHP you'll never let this book out of your site! (For visitors from USA, Canada, Mexico, United Kingdom only.)

PHP 5 Power Programming
This is a free php book from Bruce Perens' Open Source Series. In this book, PHP 5's co-creator and two leading PHP developers show you how to make the most of PHP 5's industrial-strength enhancements in any project - no matter how large or complex.

A Programmer's Introduction to PHP 4.0
This is a free php book from Apress. Beginning with a rapid introduction to PHP's syntax and basic functionality, you will swiftly understand PHP. The book then steers you toward advanced issues, like PHP's role in database manipulation, sessions, and user interactivity.

Practical PHP Programming
Free online php book by Paul Hudson. It covers topics like Simple variables and operators, Functions, Arrays, Objects, HTML Forms, Files, Databases, Cookies and Sessions, Multimedia, XML & XSLT, Output Buffering and Java and COM.

PHP Manual
The official php documentation PHP manual is available in many formats.

Build Your Own Database Driven Website Using PHP & MySQL
Four chapters can be downloaded from Build Your Own Database Driven Website Using PHP & MySQL.

Free ASP.NET books

The ASP.NET 2.0 Anthology: 101 Essential Tips, Tricks & Hacks
Free 156 Page eBook. The ASP.NET 2.0 Anthology: 101 Essential Tips, Tricks & Hacks is a collection of solutions to the most common ASP.NET problems. Let five world-class ASP.NET professionals guide you through countless practical solutions using C#. (For visitors from USA, Canada, Mexico, United Kingdom only.)

Murach's ASP.NET 2.0 Web Programming with VB 2005
Two chapters can be downloaded freely from Murach's ASP.NET 2.0 Web Programming with VB 2005. Chapter 1 - An introduction to ASP.NET web programming and Chapter 2 - How to develop a one-page web application.

Murach's ASP.NET 2.0 Web Programming with C# 2005
Two chapters can be downloaded freely from Murach's ASP.NET 2.0 Web Programming with C# 2005. Chapter 1 - An introduction to ASP.NET web programming and Chapter 2 - How to develop a one-page web application.

Build Your Own ASP.NET Website Using C# & VB.NET
Four chapters(183 pages) can be downloaded freely from Build Your Own ASP.NET Website Using C# & VB.NET. Free chapters are Chapter 1 - Introduction to .NET and ASP.NET, Chapter 2 - ASP.NET Basics, Chapter 3 - VB.NET and C# Programming Basics and Chapter 4 - Web Forms and Web Controls.

Pro ASP.NET 2.0 in C# 2005
Three chapters can be downloaded freely from Pro ASP.NET 2.0 in C# 2005. Free chapters are Chapter 9 - Data Binding, Chapter 10 - Rich Data Controls, Chapter 34 - Advanced Web Services.

Inside ASP.NET Web Matrix
Inside ASP.NET Web Matrix is a free ASP.NET ebook by Alex Homer and Dave Sussman. It has 3 parts: Part 1 - What is Web Matrix?, . Part 2 - Putting Web Matrix to Work and Part 3 - Configuring and Extending Web Matrix.