Data Warehousing and Data Mining20815 marksOLAP operation in multidimensional data model
List any two OLAP operations with example. How do you compute rule coverage and rule accuracy?
List any two OLAP operations with example. How do you compute rule coverage and rule accuracy? [5]
--- Roll-up generates a summary from a lower level to a higher level. It can be performed by: - Reducing dimensions, or - Climbing up a concept hierarchy Example: In the location dimension, data can be rolled up from city level to country level. For instance, sales data for cities like Kathmandu,...