Book Image

Learning PostgreSQL 11 - Third Edition

By : Salahaldin Juba, Andrey Volkov
Book Image

Learning PostgreSQL 11 - Third Edition

By: Salahaldin Juba, Andrey Volkov

Overview of this book

PostgreSQL is one of the most popular open source database management systems in the world, and it supports advanced features included in SQL standards. This book will familiarize you with the latest features in PostgreSQL 11, and get you up and running with building efficient PostgreSQL database solutions from scratch. Learning PostgreSQL, 11 begins by covering the concepts of relational databases and their core principles. You’ll explore the Data Definition Language (DDL) and commonly used DDL commands supported by ANSI SQL. You’ll also learn how to create tables, define integrity constraints, build indexes, and set up views and other schema objects. As you advance, you’ll come to understand Data Manipulation Language (DML) and server-side programming capabilities using PL/pgSQL, giving you a robust background to develop, tune, test, and troubleshoot your database application. The book will guide you in exploring NoSQL capabilities and connecting to your database to manipulate data objects. You’ll get to grips with using data warehousing in analytical solutions and reports, and scaling the database for high availability and performance. By the end of this book, you’ll have gained a thorough understanding of PostgreSQL 11 and developed the necessary skills to build efficient database solutions.
Table of Contents (18 chapters)

Views

A view can be considered a named query or a wrapper around a SELECT statement. Views are the essential building blocks of relational databases from a UML modeling perspective; a view can be thought of as a method for a UML class. Views share several advantages with functions; the following benefits are shared between views and stored procedures. Views can be used for the following purposes:

  • Simplifying complex queries and increasing code modularity
  • Tuning performance by caching the view results for later use
  • Decreasing the amount of SQL code
  • Bridging the gap between relational databases and object-oriented languages, especially updatable views
  • Implementing authorization at the row level, by leaving out rows that do not meet a certain predicate
  • Implementing interfaces and the abstraction layer between high-level languages and relational databases
  • Implementing last-minute...