Data Cleaning Exercises

Dataset pack

Unordered inventory export

An inventory export in arbitrary row order, with some blank aisle cells.

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 Don't fill down unordered rows.

inventory 14 rows × 4 columns

Download inventory.csv (Pro)

Data dictionary

id
Unique row ID.
aisle
Aisle code.
item
Item name.
qty
Units on the shelf.

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.