Streak Status Changes

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

Domain

SQL

Difficulty

hard

Seniority

senior

Problem

We monitor daily user status records for unauthorized state changes. Surface every row where the status changed from the previous day, with both the old and new status side by side so the team can audit the transitions.

Practice This Problem

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