DATABASE FUNDAMENTALS
WHAT IS DATABASE MANAGEMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Attribute
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Data model
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Constraint
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Relationship
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Detailed explanation-1: -Explanation: A relationship is an association among several entities. A relationship specifies how two entities are related.
Detailed explanation-2: -In general, associations are relationship types involving two or more entity types. An association between two entity types is called binary, while associations between more than two entity types are called n-ary (with the special case of 3-ary associations called ternary).
Detailed explanation-3: -Relationship in DBMS Any association between two entity types is called a relationship.
Detailed explanation-4: -Cardinality. Defines the numerical attributes of the relationship between two entities or entity sets. The three main cardinal relationships are one-to-one, one-to-many, and many-many. A one-to-one example would be one student associated with one mailing address.
Detailed explanation-5: -Data Models use three types of relationships: one-to-many, many-to-many, and one-to-one.