ocr: - DE Warehouse Users Warehouse Metadata Tiero Tier1 Tier: 2 Tier3 reach reach through through staging area centralized, mostly normalized centralized, denormalized,and data marts and personal queried directly & reach-througn nultidimensional structures databases from Tier2: and Tier: 3: structures queried directiy & queried directly Getting Data Out reach-through froml Tier 3 Getting Data In Data Movement Restructure & Restructure/ &0 Cleansing Denormalize Denormalize/ Copy Data Loads/ Cleansing/ integrate Internal & External Data FIGURE 1. Thet fouri logicait tiers ofour data warehouse.
