Data Cleaning Exercises

Dataset pack

Late-arriving events

Events with the time they happened and the (sometimes much later) time they were loaded.

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 Late events belong to their own month.

events 19 rows × 4 columns

Download events.csv (Pro)

Data dictionary

id
Unique event ID.
event_at
When it happened, ISO 8601 with offset.
loaded_at
When it was loaded.
amount
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.