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1. What is actions in SSAS? What are three types of actions in SSAS? What are the differences between them? 2. What is factless fact table? Why we need it?3. In SSAS, What is Calculated Member? 4. What is Grain of Fact? Why the data warehouse shoule be build up from the Lowest Possible Grain?5. What is Partitioning? Why we need it?6. What are the differences between B-tree indexes and Bitmapped indexes? Use examples to indicate when we should use B-tree indexes? when we should use Bitmapped indexes?

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