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Philippestefano

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Philippe Stefano

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Copyright. Freedom. Piracy. How to be more interesting. PresaCompta2.0. Opensource. Sign In to bit.ly | a simple URL shortener. Technofutur. Ontologies. Data transformation. In metadata and data warehouse, a data transformation converts a set of data values from the data format of a source data system into the data format of a destination data system. Data transformation can be divided into two steps: data mapping maps data elements from the source data system to the destination data system and captures any transformation that must occurcode generation that creates the actual transformation program A master data recast is another form of data transformation where the entire database of data values is transformed or recast without extracting the data from the database.

All data in a well designed database is directly or indirectly related to a limited set of master database tables by a network of foreign key constraints. Each foreign key constraint is dependent upon a unique database index from the parent database table. When the data mapping is indirect via a mediating data model, the process is also called data mediation. Transformational languages[edit]

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