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

Domain

SQL

Difficulty

medium

Problem

The engineering manager values developers who contribute across multiple codebases rather than siloing in one repo. Find every author who has committed to more than one repository and show how many repos they've touched.

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.