Answering queries using views (extended abstract)
PODS '95 Proceedings of the fourteenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Implementing data cubes efficiently
SIGMOD '96 Proceedings of the 1996 ACM SIGMOD international conference on Management of data
A data model for supporting on-line analytical processing
CIKM '96 Proceedings of the fifth international conference on Information and knowledge management
An overview of data warehousing and OLAP technology
ACM SIGMOD Record
Complexity of answering queries using materialized views
PODS '98 Proceedings of the seventeenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Rewriting aggregate queries using views
PODS '99 Proceedings of the eighteenth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
DynaMat: a dynamic view management system for data warehouses
SIGMOD '99 Proceedings of the 1999 ACM SIGMOD international conference on Management of data
Equivalence of Relational Algebra and Relational Calculus Query Languages Having Aggregate Functions
Journal of the ACM (JACM)
Common expression analysis in database applications
SIGMOD '82 Proceedings of the 1982 ACM SIGMOD international conference on Management of data
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EDBT '98 Proceedings of the 6th International Conference on Extending Database Technology: Advances in Database Technology
Modeling Multidimensional Databases
ICDE '97 Proceedings of the Thirteenth International Conference on Data Engineering
ICDE '97 Proceedings of the Thirteenth International Conference on Data Engineering
Optimizing Queries with Materialized Views
ICDE '95 Proceedings of the Eleventh International Conference on Data Engineering
Data Cube: A Relational Aggregation Operator Generalizing Group-By, Cross-Tab, and Sub-Total
ICDE '96 Proceedings of the Twelfth International Conference on Data Engineering
Groupwise Processing of Relational Queries
VLDB '97 Proceedings of the 23rd International Conference on Very Large Data Bases
Materialized Views Selection in a Multidimensional Database
VLDB '97 Proceedings of the 23rd International Conference on Very Large Data Bases
The GMAP: A Versatile Tool for Physical Data Independence
VLDB '94 Proceedings of the 20th International Conference on Very Large Data Bases
Aggregate-Query Processing in Data Warehousing Environments
VLDB '95 Proceedings of the 21th International Conference on Very Large Data Bases
Information Retrieval from an Incomplete Data Cube
VLDB '96 Proceedings of the 22th International Conference on Very Large Data Bases
On the Computation of Multidimensional Aggregates
VLDB '96 Proceedings of the 22th International Conference on Very Large Data Bases
Answering Queries with Aggregation Using Views
VLDB '96 Proceedings of the 22th International Conference on Very Large Data Bases
A Foundation for Multi-dimensional Databases
VLDB '97 Proceedings of the 23rd International Conference on Very Large Data Bases
Modeling Multidimensional Databases, Cubes and Cube Operations
SSDBM '98 Proceedings of the 10th International Conference on Scientific and Statistical Database Management
Querying Multidimensional Databases
DBLP-6 Proceedings of the 6th International Workshop on Database Programming Languages
Query Transformation for PSJ-Queries
VLDB '87 Proceedings of the 13th International Conference on Very Large Data Bases
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DEXA '98 Proceedings of the 9th International Workshop on Database and Expert Systems Applications
Computing queries from derived relations
VLDB '85 Proceedings of the 11th international conference on Very Large Data Bases - Volume 11
Heuristic optimization of OLAP queries in multidimensionally hierarchically clustered databases
Proceedings of the 4th ACM international workshop on Data warehousing and OLAP
Efficient Utilization of Materialized Views in a Data Warehouse
PAKDD '02 Proceedings of the 6th Pacific-Asia Conference on Advances in Knowledge Discovery and Data Mining
Processing OLAP queries in hierarchically clustered databases
Data & Knowledge Engineering - Special issue: Advances in OLAP
Rewriting queries with arbitrary aggregation functions using views
ACM Transactions on Database Systems (TODS)
User-defined aggregate functions: bridging theory and practice
Proceedings of the 2006 ACM SIGMOD international conference on Management of data
Efficient approaches for materialized views selection in a data warehouse
Information Sciences: an International Journal
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Recently there is an important interest on On-Line Analytical Processing (OLAP) technology. In this context, in order to facilitate complex analysis, data are usually modeled multidimensionally, where multiple hierarchies are associated with the dimensions. These Multidimensional (MD) data structures are called data cubes. In the existing OLAP products, the user interaction is limited to one operation at a time. Further, computing OLAP operations is very expensive since sequential scans are required.In this paper, we provide a simple data model for MD databases, and a simple algebraic MD query language that permit the modeling of the principal OLAP operations. The MD query language allows the user to directly specify the result. Therefore, optimization techniques can be applied globally to the MD query evaluation. We state declarative conditions for answering queries on cubes using exclusively one or more precomputed queries (derived cubes). Then, we provide instance independent expressions that compute an MD query on a cube from derived cubes. These results can be used to increase availability of data and to improve MD query performance.