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Book Description: The first edition of Ralph Kimball’s The Data Warehouse Toolkit introduced the industry to dimensional modeling, and now his books are considered the most authoritative guides in this space. This new third edition is a complete library of updated dimensional modeling techniques, the most comprehensive collection ever. It covers new and enhanced star schema dimensional modeling patterns, adds two new chapters on ETL techniques, includes new and expanded business matrices for 12 case studies, and more.

Honda cb 400 repair manual free download windows 7. Snapshots The first three chapters in dealt with dimension extensions. This chapter, on the other hand, discusses two techniques for extending the fact.

Some users, especially managers, may require data for a particular time. In other words, they need snapshots of data. The two fact extension techniques that deals with snapshots are periodic and accumulating.

A periodic snapshot is a periodic summary of the fact at a certain time. For example, a monthly sales order periodic snapshot is the total sales order amount at the end of every month. An accumulating snapshot tracks the changes of a fact. For example, the data warehouse may need to accumulate (store) the data of a sales order as it progresses through the order life. With Safari, you learn the way you learn best.

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