放纵
发表于 2025-3-30 08:54:29
Nadia Magnenat-Thalmann,Daniel Thalmann.e. conceptual modelling), the more willing we are in achieving a data warehouse (DW) of a high quality. From our point of view, there is a lack of more objective indicators (metrics) to guide the designer in accomplishing an outstanding model that allows us to guarantee the quality of these data wa
泥土谦卑
发表于 2025-3-30 12:28:13
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让步
发表于 2025-3-30 16:40:46
Antoine Leclercq,S. Akkouche,E. GalinThis challenge is due to the several choices of partitioning star or snowflake schemas. Data partitioning is beneficial if and only if the fact table is fragmented based on the partitioning schemas of dimension tables. This may increase the number of fragments of the fact tables dramatically and mak
缩影
发表于 2025-3-30 21:41:28
Martijn Kragtwijk,Anton Nijholt,Job Zwierstegrate data from distributed, heterogeneous data sources. Incrementally maintaining the integrated data is one of the problems being addressed in data warehousing research. This paper presents an incremental view maintenance approach based on schema transformation pathways. Our approach is not limi
重力
发表于 2025-3-31 02:55:42
Antoine Leclercq,S. Akkouche,E. Galinat aim at leveraging the optimization capabilities of most RDBMSs. However, relational query languages like SQL are not expressive enough to specify an important class of data transformations that produce several output tuples for a single input tuple. This class of data transformations is required
Narcissist
发表于 2025-3-31 07:13:33
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胖人手艺好
发表于 2025-3-31 10:56:15
https://doi.org/10.1007/978-3-7091-9435-5, when compared to the traditional data warehouses, the cost of view materialization is more expensive with respect to both computation and space. This is because the spatial data is typically larger in size, which leads to high maintenance cost, and the spatial operations are more expensive to proc
表主动
发表于 2025-3-31 15:15:20
General Animation and Simulation Platformis still a fully materialized data cube. In this paper, we present an improved structure PMC, which allow us to partially materialize cells in a QC-Trees. There is a sharp contrast between our partially materialization algorithm and other extensively studied materialized view selection algorithms. I
glowing
发表于 2025-3-31 19:50:02
Ronen Barzel,John R. Hughes,Daniel N. Woodnly restricted to such applications but are also very useful in OLAP applications. In this paper, we introduce . queries in OLAP data cubes motivated by an online advertisement tracking data warehouse application. These queries aggregate information over a specified range and then return the ranked
CRUDE
发表于 2025-4-1 01:31:00
Computer Animation and Simulation ’96ggregate list contains aggregates, calculated from the data stored in the database. In our approach, once created, the aggregates are materialized for further use. The list structure contains a table divided into pages. We present three different page-filling algorithms used when the list is browsed