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Query processing and optimization

Query processing and optimization. Definitions. Query processing translation of query into low-level activities evaluation of query data extraction Query optimization selecting the most efficient query evaluation. Query Processing (1/2). SELECT * FROM student WHERE name=Paul

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1.01k views • 45 slides

Index Structures

Index Structures. Consider a relation Employees ( eid , name, salary, age, did) stored as a heap file (unsorted) for which the only index is an unclustered index on a field called salary .

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Equality search - PowerPoint PPT Presentation

Query processing and optimization

Index Structures