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Query Optimization in DBMS by amaan is a document available to read on EtoBox.

What is Query Optimization in DBMS about?

The document discusses query optimization. It covers: 1. Alternative ways of evaluating a query and the need to estimate costs to choose the most efficient plan. Statistical information about relations is required for cost estimation. 2. Equivalence rules that can transform relational expressions into logically equivalent ones with different evaluation plans. These include rules for selections, projections, joins, and their interactions. 3. A dynamic programming approach is used to efficiently consider

Author

amaan

Language

EN