Database Abstraction: Access different types of SQL database

This package implements a database abstraction layer that provides the same interface to access different types of SQL databases.

There is a factory class that can create an instance of the database access class specialized in accessing one of the several supported types of SQL databases.

Each database access class extends a configuration class and implements the same interface that provides functionality for establishing database connections, manage transactions, execute SQL queries, retrieve query results into arrays or objects and retrieve the number of affected rows or the last inserted row identifier.

Currently it provides classes for accessing MySQL, PostgreSQL, SQLite, Microsoft SQL and Oracle.