The Rules That Broke

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

Domain

SQL

Difficulty

medium

Seniority

L3

Problem

A downstream consumer flagged bad data from the quality-checks pipeline. Surface how many data quality checks with a constraint-related rule resulted in a failure.

Summary

Constraints exist for a reason. Something violated them anyway.

Practice This Problem

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