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A collection of a same kind of entities is known as an Entity Set or entity type.
Example:
For the COLLEGE database defines earlier objects of concern are Students, Faculty, Course and departments. The sets of all the students' entities form a entity set STUDENT. Likewise collection of all the courses creates an entity set COURSE.
Entity sets require not be disjoint. For example - an entity may be part of the entity set STUDENT, the entity set FACULTY, and the entity set PERSON.
Determine Which is not a consequence of concurrent operations? Ans: Update anomaly.
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Define rotational latency time. The time spent waiting for the sector to be accessed to appear under the head is known as the rotational latency time.
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