customer service, Database Management System

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as a customer service employee, explain five measures you would recommend a displeased student to patronise a school canteen

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Log, what is the need of a log in dbms

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Set Difference If R1 and R2 are two union compatible relations or relations then result of R3 =R1- R2 is the relation that have only those tuples that are in R1 but not in R2.

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