midData Mining
What is OLAP and how is it used in data mining?
Updated May 15, 2026
Short answer
OLAP enables fast multidimensional analysis of data.
Deep explanation
OLAP systems allow slicing, dicing, drilling down, and rolling up data across dimensions for fast analytical queries. It supports decision-making processes in business intelligence.
Real-world example
Business dashboards analyzing sales by region and time.
Common mistakes
- Confusing OLAP with OLTP systems.
Follow-up questions
- OLAP vs OLTP?
- What is a data cube?