Data Cleaning Exercises

Dataset pack

Pipeline load log

A log of successful loads per source, stamped 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 Which feeds have gone stale.

loads 19 rows × 3 columns

Download loads.csv (Pro)

Data dictionary

id
Unique log ID.
source
Source system.
loaded_at
Load 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.