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)

Python DB-API 2.0

PostgreSQL is not the only relational database, and of course it's not the only one you can use with Python. There is an API in Python that is designed to unify the way applications work with databases. It's called the Python Database API. By the time this book was written, it already had the second revision of its specification, defined in the Python Enhancement Proposal (PEP) 249. The specification of the Python DB-API 2.0 is available at https://www.python.org/dev/peps/pep-0249/.

The API defines the following objects that are used when connecting to a database and interacting with it:

  • Connection: Implements the logic of connecting to the database server, authenticating, and managing transactions. A connection is created by calling the connect() function with a number of parameters, which can differ depending on the database and the driver that is...