TAILIEUCHUNG - Oracle Essbase 9 Implementation Guide- P78

Oracle Essbase 9 Implementation Guide- P78:Essbase is a multidimensional database management system. The name Essbase stands for Extended Spread Sheet dataBASE. Using the custom add-in provides the end-user with near seamless compatibility in the Microsoft Excel spreadsheet program. | Essbase Analytics Option Hierarchies Dimensions can have one or more hierarchies of the members. Included with your installation of Essbase you get the sample ASO application called ASOsamp to use as a guide when learning about ASO. In ASO there are two types of hierarchies Stored hierarchies Dynamic hierarchies An outline dimension in an ASO database can have any number of members and these members can only be set as either stored members or dynamic members. They can even have both of the hierarchies. In order to set the dimension to have both types of hierarchies you need to enable Multiple Hierarchies Enabled. If no hierarchy is defined then by default it is tagged as Stored hierarchy. To enable multiple hierarchies follow these steps 1. Right-click on the dimension or member name you wish to enable the multiple hierarchies on. Click on Edit member properties. 370 Download at Chapter 10 2. On the Member Properties screen under the Hierarchy section select Hierarchies Enabled from the Hierarchy list box Stored hierarchies Using Stored hierarchies the data is aggregated based on the outline structure. The data aggregation and data retrieval is faster. There are a few restrictions when using Stored hierarchies Stored hierarchies cannot have member formulas. Stored hierarchies can have the no-consolidation operator for Label-only members. A member that is label only is merely in the outline as a place holder or to be informational and does not store data. A good example of this is our Calendar Periods dimension. While the root member Calendar Periods is useful to have for information the data would make no sense rolled upto this level. 371 Download at Essbase Analytics Option Dynamic hierarchies Using Dynamic hierarchies the data is not aggregated but is calculated at the time of the data retrieval. Since the data is calculated at the time of retrieve the response time for the output is longer. The account dimension is always tagged as Dynamic

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