Query optimization in distributed database systems Framework for query optimization The selection of a query processing strategy involves: ± determining the physical copies…
1. Relational Model 2. Chapter 3 - Objectives • Terminology of relational model. • How tables are used to represent data. • Connection between mathematical relations…
1. Query Optimizer(Chapter 9.0 - 9.6) 2. Optimization Minimizes uses of resources by choosing best set of alternative query access plansconsiders I/O cost, CPU costgathers…
1. Topic 5 & 6 The Relational Model Er. Pradip Kharbuja 2. Terminology 1. Relation A relation is a table with columns and rows. 2. Attribute The columns in a relation…
1. Supporting Ranking in Queries Score-based Paradigm Russell Greenspan CS 411 Spring 2004 2. Supporting Ranking in Queries Talk Outline What Why How “Out-of-the-box”…