Figure 9-28: Adjusting the data warehouse database model (Top web site)
Wednesday, October 31st, 2007Figure 9-28: Adjusting the data warehouse database model ERD for an online auction house. Figure 9-24 described the analysis and design process of database modeling as being an iterative one. Steps can be repeated, in any order, and adjustments can be made during the entire process. It is better to make adjustments, particularly at the database modeling stage, during analysis and design. Make changes before any application code is written, preferably before any reworking with methodologies (such as normalization and denormalization) have been applied to database models. Seller Category Hierarchy Time Location Buyer Product Listing -Bids -History Seller seller popularity_rating join_date address return_policy international payment_methods Location region country state city Time month quarter year Buyer buyer popularity_rating join_date address Listing_Bids_History listing# listing_description listing_image listing_start_date listing_days listing_currency listing_starting_price listing_reserve_price listing_buy_now_price listing_number_of_bids listing_winning_price listing_winner_buyer luyer_bidder seller bidder_price bidder_date history_buyer history_buyer_comment_date history_buyer_comments history_seller history_seller_comment_date history_seller_comments Product product price Category_Hierarchy parent category 251 Planning and Preparation Through Analysis
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