Discover how to design, develop, and maintain your database application effectively with PostgreSQL About This Book Understand how to utilize the most frequently used PostgreSQL ecosystem-related tools and technologies A hands-on guide focused prima
Database System Concepts——数据库系统概念第六版(英文版) 作者: Abraham Silberschatz (Yale University) Henry F. Korth (Lehigh University) S. Sudarshan (Indian Institute of Technology, Bombay) 本书目录: Chapter 1 Introduction 1.1 Database-System Applications 1 1.2 Purpose
1、Create Index Directly 2、Change Conditions to Use Index 3、尽量避免在where子句中对字段进行运算,导致查询规划器放弃使用index 4、尽量避免在where子句中对字段类型进行强制转换,导致查询规划器放弃使用index 5、少用outer join,减少不必要的sub-query层级数【在不影响得到正确结果的前提下】 6、坚决避免select * 和 redundant columns【多余字段】 7、Index on Expres