SIGMOD
1997
ACM
14 years 3 months ago
1997
ACM
Data warehouses store materialized views over base data from external sources. Clients typically perform complex read-only queries on the views. The views are refreshed periodical...
SIGMOD
1997
ACM
14 years 3 months ago
1997
ACM
: The read-mostly environment of data warehousing makes it possible to use more complex indexes to speed up queries than in situations where concurrent updatesare present. The curr...
SIGMOD
1997
ACM
14 years 3 months ago
1997
ACM
Data warehouses contain large amounts of information, often collected from a variety of independent sources. Decision-support functions in a warehouse, such as on-line analytical ...
SIGMOD
1997
ACM
14 years 3 months ago
1997
ACM
SIGMOD
1997
ACM
14 years 3 months ago
1997
ACM
This paper presents general algorithms for concurrency control in tree-based access methods as well as a recovery protocol and a mechanism for ensuring repeatable read. The algori...
SIGMOD
1997
ACM
14 years 3 months ago
1997
ACM
SIGMOD
1997
ACM
14 years 3 months ago
1997
ACM
SIGMOD
1997
ACM
14 years 3 months ago
1997
ACM
A range query applies an aggregation operation over all selected cells of an OLAP data cube where the selection is speci ed by providing ranges of values for numeric dimensions. W...
SIGMOD
1997
ACM
14 years 3 months ago
1997
ACM
Aggregation in traditional database systems is performed in batch mode: a query is submitted, the system processes a large volume of data over a long period of time, and, eventual...
SIGMOD
1997
ACM
14 years 3 months ago
1997
ACM
One of the important problems in data mining is discovering association rules from databases of transactions where each transaction consists of a set of items. The most time consu...