Data Cleaning Exercises

Dataset pack

Stock movements

Stock movements where negative quantities record returns.

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 The sign carries meaning.

movements 17 rows × 3 columns

Download movements.csv (Pro)

Data dictionary

id
Unique movement ID.
sku
SKU as typed.
qty
Quantity as text; negative for returns.

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.