Unique Visitors

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

Domain

SQL

Difficulty

easy

Problem

The product team is building a monthly active users report for the board. For each calendar month in the session data, tally the number of individual users who visited at least once. Only include months that had more than two unique visitors. List the months from most recent to oldest.

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