The deployment of Data Warehouses as a business application has grown tremendously over the past decade. Data warehouses are today considered to be one of the key components of an organizations overall IT strategy and architecture. This is especially true in the current Knowledge based global economy. Innovation and creativity is the current buzzword as business enterprises struggle to retain their stranglehold and find new markets for their products or services. Data warehouses are being developed and deployed for all businesses irrespective of its size and nature. Foreseeing a huge growth potential major hardware and software vendors, across the world, have quickly developed products and services specifically targeting the data warehousing market. The objective of this book is to provide the reader with an insight to the world of Data Warehousing, in a lucid manner devoid of mathematical complications.