Athanasios Vavouras

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Data warehouse refreshment is often viewed as a problem of maintaining materialized views over operational sources. In this paper, we show that the data warehouse refreshment process is a complex process comprising several tasks, e.g., monitoring, extracting, transforming, integrating and cleaning operational data, deriving new data, building histories and(More)
In the last years, data warehousing has become very popular in organizations. The size of the data warehouse market is expected to be at least $8 billion at the end of 1998, and more than 900 vendors provide various kinds of hardware, software, and services for data warehousing. The research community noticed this trend as well and determined data(More)
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