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OLAP Queries in Data Warehousing by Shumaila Khan is a document available to read on EtoBox.
What is OLAP Queries in Data Warehousing about?
OLAP queries analyze large amounts of data across multiple dimensions to discover patterns and trends. They are complex queries that take a long time to run. OLAP queries are typically executed over a data warehouse containing historical data from multiple sources organized to support analysis. Relational OLAP (ROLAP) stores data in tables but with a star schema optimized for OLAP. It uses techniques like aggregation, indexing, and partitioning to improve query performance.
- Author
- Shumaila Khan
- Language
- EN