Let’s be honest…
Who broke production with
“just a small”
code change at least once?
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Revolutionizing SQL Data
Model Testing
Introducing SQL-Mock by DeepL
Data Geeks Meetup 2023-10-26 - Thomas Schmidt
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Model stream, ways to test and potential issues
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Model stream, ways to test and potential issues
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Model stream, ways to test and potential issues
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Model stream, ways to test and potential issues
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We need to replace
references to production models
with static data
Michelle Ark (Shopify)
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Adjustable
Static Data
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⛳ SQL Mock Design Goals
● Runs in Python
● Tool agnostic
● Writing unit tests is easy and effortless
● Low verbosity and avoid redundant code
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Demo Time! 🔥
Munich’s next Top Data Geek
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👏 Where sql-mock helped us
✅ Test the query syntax
✅ Test that query logic results in intended outcome
✅ Test edge cases
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🔮 Future plans
● Dbt integration
● Support equality assertion for CTEs within the query
● Generative AI for drafting tests
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🚀 How to get started?
● pip install “sql-mock[bigquery]”
and start testing
● Check out the repository and add your
ideas / start contributing
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Ask me now or contact me later if you have questions
Thomas Schmidt
Senior Data Scientist
@DeepL
thomas.heinz.schmidt@gmail.com
@somtom91
thomas-heinz-schmidt
We are hiring
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