A company identifies customers by email, but emails change

A medium Data Modeling interview practice problem on DataDriven. Write and execute real data modeling code with instant grading.

Domain

Data Modeling

Difficulty

medium

Problem

A company identifies customers by email, but emails change. Design a customers table with a stable surrogate primary key instead of using a business attribute as the identifier.

Practice This Problem

Solve this Data Modeling problem with real code execution. DataDriven runs your solution and grades it automatically.