Data Cleaning Exercises

Dataset pack

Order status history

Status changes per order, where some orders were opened and later closed.

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 current row, then filter.

history 11 rows × 4 columns

Download history.csv (Pro)

Data dictionary

row_id
Unique row ID.
order_id
Order ID.
status
Status as typed.
changed_at
Change time, ISO 8601 with offset.

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.