Data Cleaning Exercises

Dataset pack

Employment contract end dates

Contracts where N/A marks open-ended contracts and blanks mark dates not yet entered.

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 Not applicable is not unknown.

contracts 13 rows × 3 columns

Download contracts.csv (Pro)

Data dictionary

contract_id
Unique contract ID.
employee
Employee name.
end_date
End date, N/A for open-ended, or blank when not entered.

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.