Approximation of OLAP queries on data warehouses
We study the approximate answers to OLAP queries on data warehouses. We consider the relative answers to OLAP queries on a schema, as distributions with the L1 distance and approximate the answers without storing the entire data warehouse. We first introduce three specific methods: the uniform sampl...
| Main Author: | |
|---|---|
| Language: | English |
| Published: |
Université Paris Sud - Paris XI
2013
|
| Subjects: | |
| Online Access: | http://tel.archives-ouvertes.fr/tel-00905292 http://tel.archives-ouvertes.fr/docs/00/90/52/92/PDF/VA2_CAO_PHUONG_THAO_20062013.pdf |