Data warehousing environment

1. What is data partitioning? Give two reasons why data partitioning is helpful in a data warehousing environment.

2. What is data clustering? Give an example.

1. Give two reasons why B-Tree indexing is superior to other indexing methods.

2. What is meant by the selectivity for a column in a physical table? What type of indexing technique is suitable for low-selectivity data? Why?

1. Give two reasons why naming standards are important in a data warehouse environment.

2. List any three techniques for optimizing storage. Describe these briefly.

3. What is index-only read? How does it improve performance?


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