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    Updating relational databases through views

    When a new row is written to the table, a new unique value for the primary key is generated; this is the key that the system uses primarily for accessing the table. Other, more natural keys may also be identified and defined as alternate keys (AK).Often several columns are needed to form an AK (this is one reason why a single integer column is usually made the PK).

    updating relational databases through views-87

    The acronym CRUD refers to all of the major functions that are implemented in relational database applications.Databases make structured storage reliable and fast.They also give you a mental framework for how the data should be saved and retrieved instead of having to figure out what to do with the data every time you build a new application.For example, Google stores data about roads and provides directions to get from one location to another by driving through the Maps application.Driving directions are possible because the data is stored in a structured format.

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