In the previous article ( the most detailed! Explain the "3 layers and 6 categories" data layering in simple terms ), we explained the layering of data warehouses clearly: the background, logic, application and so on of data warehouses. Aspiring students will surely ask, who made these tiers? Are there relevant standards? If you want to understand this problem, you must first understand two people, In mon and Kimball. These two masters are like Li Bai and Du Fu in the Tang poetry world.
If you want to understand the number mobile number list of positions thoroughly, you must understand the logarithm of these two masters. What did the warehouse construction and promotion do? The best way to learn about the master is to read the original work. Since today's protagonist is Master In mon, I intensively read his book "Building the data warehouse". The first time I read the Chinese version, but many essences were missing in the translation process, so I read the original book twice.
Definition of In mon Logarithmic Bin A data warehouse is a subject-oriented, integrated, time-dependent, unmodifiable collection of data in enterprise management and decision-making. Topic-oriented: Determined according to specific business characteristics, for example: for an insurance company, the problem is: auto insurance, health insurance, etc.; for a company, the problem is: customers, insurance policies, premiums, claims. Different types of corporate themes have different collections.