PandasdrillLeft merge keeps every order
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 every order. Orders with an unknown customer get missing name and city.
What this exercise teaches
A left merge keeps every row of the left table and fills the right table's columns with NaN where no match exists. That is the usual choice when the left table is the one you are reporting on.
A hint if you get stuck
how="left" keeps all rows from the table on the left of the merge.
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