Commit Cadence

A hard SQL interview practice problem on DataDriven. Write and execute real sql code with instant grading.

Domain

SQL

Difficulty

hard

Seniority

L5

Problem

An engineering manager is auditing repositories that have gone quiet, where a repository's idleness is the average number of days between its consecutive commits. Commit timestamps are stored as text and the queries run on SQLite, so the day count has to come out of the stored timestamps. Surface the repositories whose average gap runs longer than 5 days, ordered from the most idle to the least, and number the standings as you go.

Summary

Some repos go quiet for too long.

Practice This Problem

Solve this SQL problem with real code execution. DataDriven runs your SQL queries against a real database and grades it automatically.