Entity – a set of attributes that describe a person, place, thing, or event that you intend on collecting data for.
Entity Set – a set of related entities that forms a table.
Attribute – a characteristic of an entity (table column in associated relational database).
Record - a row of data in a table
Field – is also known as an attribute
Table – a set of attributes that describe one entity
i.e., the professor can teach 0,1,2,3 classes
2. A Class can have only one professor and there must be at least one professor for a class to be held
i.e., the class must have 1 and only 1 professor
The above is represented in the following way (see figure1.1):
Entity – a set of attributes that describe a person, place, thing, or event that you intend on collecting data for.Entity Set – a set of related entities that forms a table. Attribute – a characteristic of an entity (table column in associated relational database).Record - a row of data in a tableField – is also known as an attributeTable – a set of attributes that describe one entityi.e., the professor can teach 0,1,2,3 classes2. A Class can have only one professor and there must be at least one professor for a class to be heldi.e., the class must have 1 and only 1 professorThe above is represented in the following way (see figure1.1):
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