The book is for undergraduate computer science, engineering and information technology students. The book can also be used by professionals as reference book. The book does require prerequisite knowledge of SQL computer language. The book covers Data Warehousing for beginners and introduce various concept in logical and subtle manner. The book makes an attempt to present complex topic such as ETL in rational way. The book aims to help student community to prepare for their examinations in quick and comprehensive manner without carrying big books along with them. The book should generate happy reading experience for the reader.