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What are the different approaches for database design?
There are two basic approaches for database design which are as follows:
Attribute driven: It compiles a list of attributes relevant to application, and normalizes the groups of attributes which preserve functional dependencies. Entity driven: It discovers entities which are meaningful to application, and describe them.
sql is relationally complete-justify
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The need for three level architecture The aim of the three level architecture is to divide each user's view of the database from the way the database is physically shown.
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