Data Cleaning Exercises

Dataset pack

Account status history

Account status changes where some rows lost their timestamp in an export.

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 Unknown times never win.

statuses 17 rows × 4 columns

Download statuses.csv (Pro)

Data dictionary

row_id
Unique row ID.
account
Account code as typed.
status
Status at that time.
updated_at
Change time, ISO 8601 with offset; may be missing or unreadable.

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.