Titlebook: Data Warehousing and Knowledge Discovery; Second International Yahiko Kambayashi,Mukesh Mohania,A. Min Tjoa Conference proceedings 2000 Spr

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水汽

Applying Vertical Fragmentation Techniques in Logical Design of Multidimensional Databasess consists of materializing redundant aggregates called views. In this paper we investigate the problem of vertical fragmentation of views aimed at minimizing the workload response time. Each view includes several measures which not necessarily are always requested together; thus, the system perform

道學(xué)氣

Space-Efficient Data Cubes for Dynamic Environmentsn data cubes is the range query. For range queries that summarize large regions of massive data cubes, computing the query result on-the-fly can result in non-interactive response times. To speed up range queries, values that summarize regions of the data cube are precomputed and stored. This faster

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On Making Data Warehouses Activecisions must be carried out .. This paper introduces a novel architecture, the ., which applies the idea of event-condition-action rules (ECA rules) from active database systems to automize repetitive analysis and decision tasks in data warehouses. The work of an analyst is mimicked by ., which exte

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On the Importance of Tuning in Incremental View Maintenance: An Experience Case Studyl maintenance is feasible over a wide range of update sizes (.), that intuitive SQL formulations perform poorly, but that there are better alternatives. We show that these results can be meaningfully evaluated and presented only in the context of reasonable instance tuning.

報復(fù)

BEDAWA - A Tool for Generating Sample Data for Data Warehousesfficulties often arise in producing familiar, complete and consistent sample data of any scale. Producing sample data manually often causes problems, which can be avoided by an automatic generation tool producing consistent and statistical plausible data. The data generated by the tool is based on t

紡織品

DyDa: Dynamic Data Warehouse Maintenance in a Fully Concurrent Environmenturces (ISs) into one materialized repository. In dynamic environments such as the web, DWs must be maintained in order to stay up-to-date. Recent maintenance algorithms tackle this problem of DW management under concurrent data updates (DU), whereas the EVE system is the first to handle (non-concurr

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