This book is part of the official documentation of PostgreSQL. It is written by the PostgreSQL developers and other volunteers in parallel to the development of the PostgreSQL software. It describes all the functionality that the current version of PostgreSQL officially supports.

PostgreSQL Reference Manual Volume 2: Programming Guide

PostgreSQL (pronounced “Postgres-Q-L”) is a powerful database system with a long history, going back over 20 years to the postgres project at the University of California at Berkeley. Today it provides a high level of conformance with the ANSI-SQL 92/99 standards and is fully ACID compliant.

Essential SQL

Free Download Essential SQL ebook

Alison Balter's Mastering Access

At its most basic level, Access can be used to develop simple personal database management systems.

Teach Yourself SQL in Days 21, Second Edition

The first 14 days of this book show you how to use SQL to incorporate the power of modern relational databases into your code. By the end of Week 1, you will be able to use basic SQL commands to retrieve selected data.

Oracle Unleashed

Oracle Unleashed is one of the most comprehensive books on Oracle and its tools available today. It's written by authors who have real-life experience using the Oracle tools (most of whom are members of the Oracle Business Alliance Program). We will show you what's important, the pitfalls, tips from real-life experiences, and code examples—The kind of information that can give you the cumulative experience of many years of expertise.

Teach Yourself Oracle 8 in 21 Days

Teach Yourself Oracle 8 in 21 Days

Oracle DBA Survial Guide

Oracle DBA open ebook

MySQL 5.1 Reference Manual

This is the MySQL Reference Manual. It documents MySQL 5.1 through 5.1.7-beta.

MySQL Essentials

MySQL Essentials is an online book designed to provide everything a user needs to know to install, build, maintain and secure MySQL based databases.