Data Cleaning Exercises

Dataset pack

Store unit sales by month

Unit sales rows per store and month, with repeated store-month rows and months beyond Q1.

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 Total before you pivot.

sales 24 rows × 4 columns

Download sales.csv (Pro)

Data dictionary

row_id
Unique row ID.
store
Store code as typed.
month
Three-letter month as typed.
units
Units sold 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.