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Getting Started with DuckDB

You're reading from   Getting Started with DuckDB A practical guide for accelerating your data science, data analytics, and data engineering workflows

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Product type Paperback
Published in Jun 2024
Publisher Packt
ISBN-13 9781803241005
Length 382 pages
Edition 1st Edition
Languages
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Authors (2):
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Ned Letcher Ned Letcher
Author Profile Icon Ned Letcher
Ned Letcher
Simon Aubury Simon Aubury
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Simon Aubury
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Table of Contents (15) Chapters Close

Preface 1. Chapter 1: An Introduction to DuckDB FREE CHAPTER 2. Chapter 2: Loading Data into DuckDB 3. Chapter 3: Data Manipulation with DuckDB 4. Chapter 4: DuckDB Operations and Performance 5. Chapter 5: DuckDB Extensions 6. Chapter 6: Semi-Structured Data Manipulation 7. Chapter 7: Setting up the DuckDB Python Client 8. Chapter 8: Exploring DuckDB’s Python API 9. Chapter 9: Exploring DuckDB’s R API 10. Chapter 10: Using DuckDB Effectively 11. Chapter 11: Hands-On Exploratory Data Analysis with DuckDB 12. Chapter 12: DuckDB – The Wider Pond 13. Index 14. Other Books You May Enjoy

Analyzing pedestrian traffic through Melbourne CBD

Now that we’ve prepared our dataset and covered the tools we’re going to use, let’s jump into some analysis of the Melbourne pedestrian counting dataset. We’ll continue to use DuckDB with JupySQL to query our pedestrian_counts table, and Plotly to make visualizations. Note that we won’t always display the dataframe showing the results of our query. As you’re working through the examples, we encourage you to inspect the contents of the dataframes yourself.

Visualizing total pedestrian counts over time

To start with, let’s get a sense of how the total number of pedestrian counts registered by the sensor network has changed over the years in the dataset. We’ll start by querying the pedestrian_counts table to get the sum of all counts within each year in the dataset:

%%sql year_counts_df <<
SELECT Year, sum(Hourly_Counts)::BIGINT AS Total_Counts
FROM pedestrian_counts...
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