One-to-many relationship Listing FactsListing Facts Seller seller_id seller
One-to-many relationship Listing FactsListing Facts Seller seller_id seller popularity_rating join_date address return_policy international payment_methods Location location_id region country state city Time time_id month quarter year Category_Hierarchy category_id parent_id (FK) category Listing fact_id time_id (FK) buyer_id (FK) location_id (FK) seller_id (FK) category_id (FK) 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 Buyer buyer_id buyer popularity_rating join_date address Seller seller_id seller popularity_rating join_date address return_policy international payment_methods Location location_id region country state city Time time_id month quarter year Category_Hierarchy category_id parent_id (FK) category Bid fact_id time_id (FK) buyer_id (FK) location_id (FK) seller_id (FK) category_id (FK) bidder bidder_price bidder_date Buyer buyer_id buyer popularity_rating join_date address Bid FactsBid Facts Seller seller_id seller popularity_rating join_date address return_policy international payment_methods Location location_id region country state city Time time_id month quarter year Category_Hierarchy category_id parent_id (FK) category History fact_id time_id (FK) buyer_id (FK) location_id (FK) seller_id (FK) category_id (FK) history_buyer history_buyer_comment_date history_buyer_comments history_seller history_seller_comment_date history_seller_comments Buyer buyer_id buyer popularity_rating join_date address History Facts History Facts Histories pertain to sellers and buyers only Figure 10-33: Dividing the data warehouse database model into separate facts.
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