Net Lines

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

Domain

SQL

Difficulty

medium

Seniority

L3

Problem

Engineering wants to see who is growing the codebase versus trimming it. Each commit records lines added and lines removed. For each author, compute their net line contribution (total added minus total removed).

Summary

Some authors build. Others trim. The net tells the truth.

Practice This Problem

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