Data Cleaning Exercises

Dataset pack

Game scores

Point entries per player from a tournament, with typed player names and some invalid entries.

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 A leaderboard with a defined order.

scores 14 rows × 3 columns

Download scores.csv (Pro)

Data dictionary

row_id
Unique entry ID.
player
Player name as typed.
points
Points 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.