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The Data Warehouse Toolkit - The Complete Guide to Dimensional Modeling

The relational database uses the concept of linked two-dimensional tables consisting of rows and columns, as shown in Figure 1-2. Unlike the hierarchical approach, no predetermined relationship exists between distinct tables. This means that the data needed to link together the different areas of the network or hierarchical model need not be defined. Because relational users don’t need to understand the representation of data in storage to retrieve it (many such users created ad hoc queries against the data), ease of use helped popularize the relational model | The Data Warehouse Toolkit Second Edition The Complete Guide to Dimensional Modeling Ralph Kimball Margy Ross Wiley Computer Publishing John Wiley Sons Inc. NEW YORK CHICHESTER WEINHEIM BRISBANE SINGAPORE TORONTO The Data Warehouse Toolkit Second Edition The Data Warehouse Toolkit Second Edition The Complete Guide to Dimensional Modeling Ralph Kimball Margy Ross Wiley Computer Publishing John Wiley Sons Inc. NEW YORK CHICHESTER WEINHEIM BRISBANE SINGAPORE .