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Define Partial Key and Primary Key
A partial key, also known as discriminator, is the set of attributes which can uniquely identify weak entities that are related to similar owner entity. Primary key is a unique key but not comprise null values. An entity set can comprise at most one primary key.
What are the Objectives of object design After going through this unit, you could be able to: explain steps of object design; discuss algorithms that reduce costs;
Explain four causes for failures in data warehouse projects
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#question.explain diversity and magnitude of organic compounds and general properties?
DISADVANTAGES OF RDBMS
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