How to use Relational OLAP?

How to use and/or create Relational OLAP (ROLAP)? Any information will help... Thanks

There are three ways to create OLAP metadata on a relational schema.
1) OEM - You can use the Dimension and Cube wizards in Enterprise Manager (Administration Tab -> BI & OLAP link) to create the required additional metadata to enable OLAP queries against an existing relational schema. However, you cannot save the steps or resulting script to a SQL file for re-use. This is more a one-off method for quickly and easily creating OLAP metadata.
2) OWB - A more scalable solution is to use Warehouse Builder. Even if you have an existing schema you can import the tables/views and then create new dimensions and cubes and map those tables to those objects. The deployment information can be saved to a script
3) You can refer to the OLAP developers guide to help you manually create the SQL scripts to generate the CWM OLAP metadata against existing tables.
Make sure you have all the required database patches in place:
9i - at least 9.2.0.7
10gR1 - at least 10.1.0.4
10gR2 - at least 10.2.0.3
Hope this helps
Keith

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null

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