Efficient refreshment of materialized views with multiple sources
Hui Wang, Maria E. Orłowska, Weifa Liang · 1999
A data warehouse collects and maintains a large amount of data from multiple distributed and autonomous data sources. Often the data in it is stored in the form of materialized views in order to provide fast access to the integrated data. However, maintaining a certain level consistency of warehouse data with the source data is challenging in a distributed multiple source environment. Transactions containing multiple updates at one or more sources further complicate the consistency issue.