Data Analysis for ML/AI
Joining and merging data
Inner/outer/left/right joins, merge keys, fuzzy matches, time-based joins.
5 lessons
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Work through these in order—each lesson builds on the previous one.
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Lesson 1 of 5
Join fundamentals: keys and cardinality
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Lesson 2 of 5
Inner, outer, and anti-joins in practice
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Lesson 3 of 5
Fuzzy matching: dirty keys and entity resolution
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Lesson 4 of 5
Set operations: union, intersect, except
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Lesson 5 of 5
Join performance and pitfalls