Data Cleaning Exercises

Dataset pack

Catalog price versions

A price history including versions scheduled to start after the reporting date.

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 Pick the version in force on a date.

versions 12 rows × 4 columns

Download versions.csv (Pro)

Data dictionary

row_id
Unique row ID.
sku
SKU as typed.
price
Price, two decimals.
valid_from
Date the version takes effect.

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.