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Chapter 16: Query Optimization

Chapter 16: Query Optimization

Chapter 16: Query Optimization. Outline. Introduction Transformation of Relational Expressions Catalog Information for Cost Estimation Statistical Information for Cost Estimation Cost-based optimization Dynamic Programming for Choosing Evaluation Plans Materialized views. Introduction.

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879 views • 84 slides
Chapter 16: Query Optimization

Chapter 16: Query Optimization

Chapter 16: Query Optimization. Outline. Introduction Transformation of Relational Expressions Catalog Information for Cost Estimation Statistical Information for Cost Estimation Cost-based optimization Dynamic Programming for Choosing Evaluation Plans Materialized views. Introduction.

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847 views • 84 slides
Chapter 13: Query Optimization

Chapter 13: Query Optimization

Chapter 13: Query Optimization. Chapter 13: Query Optimization. Introduction Transformation of Relational Expressions Catalog Information for Cost Estimation Statistical Information for Cost Estimation Cost-based optimization Dynamic Programming for Choosing Evaluation Plans

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666 views • 66 slides
Concepts of DB(3) Relational Operation & SQL

Concepts of DB(3) Relational Operation & SQL

Concepts of DB(3) Relational Operation & SQL. ??????? ????????? ???. ? Relational Data Operation. Procedural language The user instructs the system to perform a sequence of operations on the database to compute the desired result ? what & how Relational algebra Nonprocedural language

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652 views • 55 slides
Relational Algebra

Relational Algebra

Relational Algebra. The basic set of operations for the relational model is the relational algebra. enable the specification of basic retrievals The result of a retrieval is a new relation, which may have been formed from one or more relations.

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546 views • 34 slides
Relational Algebra

Relational Algebra

Relational Algebra. The basic set of operations for the relational model is the relational algebra. enable the specification of basic retrievals The result of a retrieval is a new relation, which may have been formed from one or more relations.

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401 views • 34 slides
Relational Algebra

Relational Algebra

Relational Algebra. The basic set of operations for the relational model is the relational algebra. enable the specification of basic retrievals The result of a retrieval is a new relation, which may have been formed from one or more relations.

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342 views • 34 slides

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