PandasdrillInner merge on a shared key
A pandas exercise from Pandasdrill. Solve it with a Python editor in your browser running real pandas, and it is checked the moment you submit.
The task
Join `orders` to `customers` on `cust_id`, keeping only orders whose customer exists. Row order and column order do not matter here.
What this exercise teaches
An inner merge keeps only keys found in both tables, so an order placed by an unknown customer id drops out. Each matching order gets that customer's name and city.
A hint if you get stuck
merge defaults to an inner join. Use on= when the key has the same name in both tables.
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