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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
realpython.com
After you learned the basics you can try your knowledge at Edabit where you get some tips for every task or try it all by your self via Codewars
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