Data Cleaning Exercises

Dataset pack

Orders around Q1 2026

An order extract spanning late 2025 to mid 2026, of which only Q1 2026 belongs in the report.

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 Scope rows to a date window.

orders 21 rows × 3 columns

Download orders.csv (Pro)

Data dictionary

id
Unique order ID.
order_date
Order date, YYYY-MM-DD as text.
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.