Data Cleaning Exercises

Dataset pack

Marketing touches

Marketing touches per customer logged by tools in different time zones.

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 First-touch attribution.

touches 12 rows × 4 columns

Download touches.csv (Pro)

Data dictionary

touch_id
Unique touch ID.
customer
Customer handle.
channel
Marketing channel.
at
Touch time, ISO 8601 with offset.

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.