Explain the query processing, Database Management System

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Explain the Query Processing

Data Query Processing permits a user to report or analyze structured and unstructured data pulled from multiple data sources.

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Entities Let us first be aware of the question: What are entities? An entity is an object of concern used to show the things in the actual world, e.g., table, car, bo

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Example - ALTER TABLE emp MODIFY (empno NUMBER (7));

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What do you mean by Correlated subquery? Subqueries, or nested queries, are used to bring back a set of rows to be used by the parent query. Depending on how the subquery is writ

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If the deletion violates referential integrity constraint, then three alternatives are available: Default option: - refuse the deletion. It is the job of the DBMS to describ

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