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... A database view is a portion of the data structured in a way suitable to a specific on views must be translated into updates on the underlying database. This translation process in the relational model. The procedure is as follows: first, a “complete” ...
Publication - erhard - 04/17/2013 - 09:38 - 0 comments - 0 attachments
... 970.14 KB In relational databases a view definition is a query against the database, and ... materialization over a database may change as relations in the database undergo modificationsIn this paper a mechanism is proposed in which the view is materialized at all times The problem which this mechanism ...
Publication - cat - 04/17/2013 - 08:05 - 0 comments - 1 attachment
... Proceedings of the Workshop on Evolution and Change in Data Management (ECDM 2006), LNCS 4231, pp. 237-246 ... problems related to database evolution is how to reflect in the data level the changes that have occurred in the conceptual schema of ...
Publication - jlloret - 04/16/2013 - 06:05 - 0 comments - 0 attachments
... administrators are called on to write complex mappings in which they specify in tedious detail how the data is to be transformed. Even once deployed, ...
Publication - cat - 04/16/2013 - 02:38 - 0 comments - 0 attachments