Overview

This is an in-progress set of course notes for Data 101: Data Engineering, UC Berkeley.

This repository is updated semi-weekly and is meant to be used in addition to lecture. In other words, these notes contain core concepts for reference, whereas lecture contains activities and demos for internalizing the concepts.

Table of Contents

Chapters are bundled by topic, not by lecture number. This means that content can appear out of order compared to what is presented in lecture. We will try to indicate this where possible.

Navigate with the sidebar or with the links below:

SQL

• 1. SQL
  • 1.1. SQL Review
  • 1.2. String Manipulation
  • 1.3. Truncating Relations
  • 1.4. Creating Tables and Views from Data
  • 1.5. Common Table Expressions (CTE)
  • 1.6. Subqueries
  • 1.7. DML—Data Manipulation Langauge
  • 1.8. DDL–Data Definition Language
  • 1.9. Keys & Constraints

Relational Algebra

• 2. Relational Algebra
  • 2.1. Relational Algebra Overview
  • 2.2. Extended RA Operators

Query Performance

• 3. Query Performance
  • 3.1. Index Selection
  • 3.2. Query Planning
  • 3.3. Rules of Thumb

Data Modeling

• 4. Data Modeling
  • 4.1. Data Models

Data Preparation

• 5. Data Preparation
  • 5.1. Structural
  • 5.2. Numerical, Granularity
  • 5.3. Outliers
  • 5.4. Imputation and Entity Resolution

Appendix

• SQL Style Guide

Course Acknowledgments

The content and structure of Data Engineering have been designed and developed over the years thanks to many dedicated faculty and instructors at UC Berkeley.

Valuable and essential instructional contributors (alphabetical order): Joe Hellerstein, Lakshya Jain, Aditya Parameswaran, and Lisa Yan.

Course notes in particular were developed over many semesters by many teaching assistants. Thank you!!