A contacts table stores multiple phone numbers as comma-separated text in one column, a 1NF violatio
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 contacts table stores multiple phone numbers as comma-separated text in one column, a 1NF violation. Fix it.
Practice This Problem
Solve this Data Modeling problem with real code execution. DataDriven runs your solution and grades it automatically.