Book Image

Data Engineering with Python

By : Paul Crickard
Book Image

Data Engineering with Python

By: Paul Crickard

Overview of this book

Data engineering provides the foundation for data science and analytics, and forms an important part of all businesses. This book will help you to explore various tools and methods that are used for understanding the data engineering process using Python. The book will show you how to tackle challenges commonly faced in different aspects of data engineering. You’ll start with an introduction to the basics of data engineering, along with the technologies and frameworks required to build data pipelines to work with large datasets. You’ll learn how to transform and clean data and perform analytics to get the most out of your data. As you advance, you'll discover how to work with big data of varying complexity and production databases, and build data pipelines. Using real-world examples, you’ll build architectures on which you’ll learn how to deploy data pipelines. By the end of this Python book, you’ll have gained a clear understanding of data modeling techniques, and will be able to confidently build data engineering pipelines for tracking data, running quality checks, and making necessary changes in production.
Table of Contents (21 chapters)
Section 1: Building Data Pipelines – Extract Transform, and Load
Section 2:Deploying Data Pipelines in Production
Section 3:Beyond Batch – Building Real-Time Data Pipelines

Installing and configuring PostgreSQL

PostgreSQL is an open source relational database. It compares to Oracle or Microsoft SQL Server. PostgreSQL also has a plugin – postGIS – which allows spatial capabilities in PostgreSQL. In this book, it will be the relational database of choice. PostgreSQL can be installed on Linux as a package:

  1. For a Debian-based system, use apt-get, as shown:
    sudo apt-get install postgresql-11
  2. Once the packages have finished installing, you can start the database with the following:
    sudo pg_ctlcluster 11 main start
  3. The default user, postgres, does not have a password. To add one, connect to the default database:
    sudo -u postgres psql
  4. Once connected, you can alter the user and assign a password:
    ALTER USER postgres PASSWORD ‚postgres';
  5. To create a database, you can enter the following command:
    sudo -u postgres createdb dataengineering

Using the command line is fast, but sometimes, a GUI makes life easier. PostgreSQL...