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Explain Composite attribute in SQL ?
Composite attribute: A composite attribute has many components, each of that is atomic or composite.
Normal 0 false false false EN-IN X-NONE X-NONE
Consider the subsequent relation Professor (Pfcode, dept, head, time) It is assumed that (i) A professor can work in much more than one
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For each m:n relationship type R, we make a new table (say S) to represent R. We also contain the primary key attributes of both the participating entity types as a foreign key att
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What is Primary key? Primary Key - Primary key is one of the candidate keys which uniquely identifies each row in the relation.
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Identify the need and use of data control through problem solving, illustration
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