Search: in, Spyratos, N

4 results

Results

Update Semantics of Relational Views

... 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

On lossless tranformation of databases schemes not necessarily satisfying universal instance assumption

... to the original one. This question was addressed in the literature with respect to those relational schemes that satisfy the so ... \"tractable\" We are able to test losslessness defined in such a way for a wide class of relational expressions and dependencies. An ...

Publication - huliganka - 04/17/2013 - 00:27 - 0 comments - 1 attachment

Complements for Data Warehouses

... Views over databases have recently regained attention in the context of data warehouses, which are seen as materialized views. In this setting, efficient view maintenance is an important issue, for which ...

Publication - huliganka - 04/16/2013 - 23:49 - 0 comments - 1 attachment

Monotonic complements for independent data warehouses

... Views over databases have regained attention in the context of data warehouses, which are seen as materialized views. In this setting, efficient view maintenance is an important issue, for which ...

Publication - cat - 04/16/2013 - 19:38 - 0 comments - 1 attachment