What is the use of unique function, Database Management System

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What is the use of unique function?

UNIQUE function: If UNIQUE is specified then only unique values are used to computed the mean.

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Consider entity type Employee with attributes empNumber (this is unique), empName, and the year when he/she was hired. An employee can either be a technical employee, a marketing e

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Draw an e-r diagram and convert it to a relational schema, In an organizati...

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Assignment, am looking for assignment helper for dbms

am looking for assignment helper for dbms

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Consider the subsequent relations for a database which keeps track of business trips of salespersons in a sales office: SALESPERSON (SSN, Name, start_year, Dept_no) TRIP (SSN, Fr

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