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week_4 - Alternatekeyis any candidate key which is not...

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Alternate key  is any candidate key which is not selected to be the primary key. Candidate key  is a minimal superkey for that relation; that is, a set of attributes such that # the relation does not have two distinct tuples with the same values for these attributes # there is no proper subset of these attributes. Functional dependence  is a constraint between two sets of attributes in a relation from a database. update anomaly  is a systematic way of ensuring that a database structure is suitable for general- purpose querying and free of certain undesirable characteristics—insertion, update, and deletion anomalies—that could lead to a loss of data integrity. Answer the following: Why is normalization of a database important? it minimizes the redundancy in information, thus reducing the disk space occupied by the database itself. It also reduces the risk of an error affecting the information.
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