COMPUTER APPLICATIONS
DATABASE MANAGEMENT SYSTEMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Entity
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Key
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Normalization
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Attribute
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Relation
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Detailed explanation-1: -An entity in DBMS (Database management System) is a real-world thing or a real-world object which is distinguishable from other objects in the real world. For example, a car is an entity. An attribute of an entity gives us information about the characteristic features of an entity.
Detailed explanation-2: -The relationship between an entity type and an entity set is analogous to the relationship between a row and a table in a relational database: Like a row, an entity type describes data structure, and, like a table, an entity set contains instances of a given structure.
Detailed explanation-3: -An entity is something that exists in itself, actually or potentially, concretely or abstractly, physically or not. It needs not be of material existence. In computer science, an object is a location in memory having a value and possibly referenced by an identifier.