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Deze oefening maakt deel uit van de cursus
In this chapter, you'll learn how to create a DataFrame from a CSV, how to inspect a DataFrame, how to select subsets of rows and columns and how to sort and summarize a DataFrame.
Next up, you'll learn how to transform data with expressions, how to add or update columns in a DataFrame, how to work with multiple columns and get an introduction to lazy mode and query optimization.
In the final chapter, you'll learn how to filter a DataFrame to get a subset of rows, how to handle missing or duplicated values, grouping by one or more columns and converting a DataFrame between long and wide formats.
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