Data Cleaning Exercises

Dataset pack

Order history for features

Customer orders spanning 2025 and 2026, for features as of 2026-01-01.

Fictional data · UTF-8 CSV, every value quoted so padding and leading zeros survive; empty fields are missing values · free for personal and classroom practice · practise it in Features only from before the prediction date.

orders 19 rows × 4 columns

Download orders.csv (Pro)

Data dictionary

id
Unique order ID.
customer
Customer handle.
order_date
Order date, YYYY-MM-DD.
amount
Order amount as text.

Values are shown in quotes so leading and trailing spaces are visible. ∅ means the cell is missing. Exercises are also graded on hidden datasets that are never published.