Joins
join combines frames on keys with explicit join strategies.
What you will be able to do
- Use join(other, on=...).
- Choose how.
- Validate cardinality.
In plain English
join combines frames on keys with explicit join strategies.
- Use join(other, on=...).
- Choose how.
- Validate cardinality.
courses = pl.DataFrame({'slug': ['css'], 'title': ['CSS']})
print(df.join(courses, left_on='course', right_on='slug', how='left'))Your turn
EasyExplain it back
Answer from memory: Which argument controls join type?
TEXT · starter
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Knowledge checkQuestion 1
Which argument controls join type?
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