Data Cleaning Exercises

Dataset pack

Support ticket queue

Open support tickets, some unassigned, created from offices in several 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 A work queue with unassigned first.

tickets 15 rows × 3 columns

Download tickets.csv (Pro)

Data dictionary

id
Unique ticket ID.
owner
Assigned agent; blank when unassigned.
created_at
Creation 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.