Dataset pack
Sign-ups with mixed date quality
Sign-up records exported from a form, with missing, impossible and pre-launch dates.
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 Validate sign-up dates.
signups 14 rows × 3 columns
Download signups.csv (Pro)Data dictionary
- id
- Unique sign-up ID.
- Email address.
- signup_date
- Sign-up date as text, expected YYYY-MM-DD.
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.