Lecture

Cost-based Query Optimization

Description

This lecture covers the fundamentals of cost-based query optimization in database systems, including heuristics, cost estimation, selectivity estimation, and join cardinality estimation. It explains how to generate cost estimates for executing query plans, optimize join orders, and estimate the number of intermediary results. The instructor discusses various techniques such as histograms, equi-width, and equi-depth histograms for accurate selectivity estimation. The importance of join cardinality estimates for optimizing join operations is also highlighted, emphasizing the need to reorder joins efficiently to minimize query execution costs.

About this result
This page is automatically generated and may contain information that is not correct, complete, up-to-date, or relevant to your search query. The same applies to every other page on this website. Please make sure to verify the information with EPFL's official sources.