Notes on SDLC Models

Waterfall The Waterfall Model assumes that distinct phases of development of a whole system exist for analysis, preliminary design, detailed design, coding and unit test, and system test. Documentation produced at the end of each phase provides the basis for work performed in the next phase of development. In the Waterfall Model, characterized by a […]

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ETL Process in Data Warehouse

ETL  Extraction  Transformation  Loading ETL Overview  Extraction Transformation Loading – ETL  To get data out of the source and load it into the data warehouse – simply a process of copying data from one database or source to another destination.  Data is extracted from an OLTP database, transformed to […]

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