The Green Light

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

Domain

SQL

Difficulty

easy

Seniority

L3

Problem

The release team wants the roster of engineers who have landed at least one successful deployment. Return one entry per author, skipping any record with a blank author.

Summary

Success hides behind a dozen spellings. Find who actually shipped.

Practice This Problem

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