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ENG001 - Elementary English Solved Past Papers

VU ENG001 - All Subjective Solved Past Papers 2021 - Elementary English

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A candidate key chosen by the database designer to act as key is the primary key. An entity type may have more than one candidate keys, in that case the database designer has to designate one of them as primary key, since there is always only a single primary key in an entity type. The primary key can also be defined as the successful candidate key. (Page 82)

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The relationship is a link or association between one or more entity types and we discussed it in E-R data model. However the degree of a relation is the number of columns in that relation.

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First Normal Form

A relation is in first normal form if and only if every attribute is single valued for each tuple. This means that each attribute in each row , or each cell of the table, contains only one value. No repeating fields or groups are allowed. An alternative way of describing first normal form is to say that the domains of attributes of a relation are atomic, that is they consist of single units that cannot be broken down further. There is no multivalued (repeating group) in the relation multiple values create problems in performing operations like select or join. For Example there is a relation of Student

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Provide solution with reference to earn 1000 credits

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Provide solution with reference to earn 1000 credits

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