the data warehousing ebusiness dba handbook

[...]... to the database professionals is to understand effective techniques for the loading and maintaining of these very large database systems This book brings together some of the world's foremost authors on data warehousing in order to provide you with the insights that you need to be successful in your data warehousing endeavors xiv The Data Warehousing eBusiness DBA Handbook Data Warehousing and eBusiness. .. of data is recreated every day When it comes to looking at the larger picture - not the cost of data for a single item, but for the cost of data for all data - the data warehouse greatly eases the burden placed on the information systems organization Fig 5 shows the difference between having a data warehouse and not having a data warehouse in the case of finding multiple types of data 14 The Data Warehousing. .. about architecture, data models, articles, presentations, white papers, near line storage, exploration warehousing, methodologies and other important topics 18 The Data Warehousing eBusiness DBA Handbook The Value of the Data Warehouse CHAPTER 3 The Foundations of E-Business The basis for a long-term, sound e-business competitive advantage is the data warehouse Why the Internet? Consider the Internet When... data warehouse The Data Warehousing eBusiness DBA Handbook In Figure 3, multiple applications have been built from the same supporting applications Looking at figure 3, it becomes clear that the same processing accessing data, gathering data, editing data, cleansing data, merging data and integrating data -are done for every application Almost all of the processing shown is redundant There is no need... to be accessed to get the desired information Some of the data is in IMS; some is in VSAM Yet other files are in ADABAS The key structure of the European file is different from the key structure of the Asian file The parts data uses different closing dates than the truck data The body design for cars is called one thing in the cars file and another thing in the parts file To get the required information... his seminars xii The Data Warehousing eBusiness DBA Handbook Foreword With the advent of cheap disk I/O subsystems, it is finally possible for database professionals to have databases store multiple billions and even multiple trillions of bytes of information As the size of these databases increases to behemoth proportions, it is the challenge of the database professionals to understand the correct techniques... for information The granular integrated data that resides in the data warehouse is ideal for being shaped and reshaped One analyst can look at the data one way; another analyst can look at the same data in yet another way And you only have to create the infrastructure once The financial analyst may spend 30 minutes tracking down a unit of data, such as consolidated sales Or if the data is difficult... what every other application has done Figure 4 shows that by building a data warehouse, the repetitive activities are done just once Figure 3: Building a data warehouse for the different applications Making the Most of E-business 7 In figure 4, the infrastructure activities of accessing data, gathering data, editing data, cleansing data, merging data and integrating data are done once The savings are... shows the corporate information factory and the Web environment Sitting behind the web site is the infrastructure called the "corporate information factory" Figure 2: Figure 2 shows that the Web environment serves as a conduit into the corporate information factory The corporate information factory provides a variety of important functions for the Web environment: 4 The Data Warehousing eBusiness DBA Handbook. .. is the data warehouse The data warehouse is a structure that contains: detailed, granular data integrated data historical data corporate data A convenient way to think of the data warehouse is as a structure that contain very fine grains of sand Different Making the Most of E-business 5 applications take those grains of sand and reshape them into the form and structure that is most familiar to the . x The Data Warehousing eBusiness DBA Handbook About the Authors Bill Inmon is universally recognized as the "father of the data warehouse." He has more than 26 years of database. need to be successful in your data warehousing endeavors. xiv The Data Warehousing eBusiness DBA Handbook 1 Data Warehousing and eBusiness CHAPTER Making the Most of E-business Everywhere. Chapter 4 - The Role of the eDBA 28 Logic, e-Business, and the Procedural eDBA by Craig S. Mullins 28 The Classic Role of the DBA 28 The Trend of Storing Process With Data 30 Database Code