Verify Commit ID Uniqueness

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

Domain

SQL

Difficulty

easy

Seniority

L3

Problem

You suspect duplicate commit IDs crept into the repo metadata table. Show the total count of commit IDs next to the count of unique commit IDs so you can verify at a glance.

Summary

Duplicate commit IDs. Are there any?

Practice This Problem

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