Data Cleaning Exercises

Dataset pack

Postings around a period close

Ledger postings from offices in several time zones around the March close.

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 Period close is an instant.

postings 15 rows × 3 columns

Download postings.csv (Pro)

Data dictionary

id
Unique posting ID.
posted_at
Posting time, ISO 8601 with offset.
amount
Posting amount 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.