22 How to create a Composite Unique Key in SQL Server? | Step-by-Step Tutorial

Complete playlist is here: https://www.youtube.com/playlist?list=PLKFKd7UiwVxMiV9Cy7gaF8A_ylx4FuFA9 Enforce uniqueness across multiple columns in a table. This is a very common real-world database requirement, especially when a single column is not enough to uniquely identify records. ✅ What you’ll learn in this video What is a Composite Unique Key in SQL Server Difference between UNIQUE key vs Composite UNIQUE key Why and when composite unique keys are used How to create a composite UNIQUE constraint How SQL Server handles duplicate data Real-world example with multiple columns Composite UNIQUE key checks combined column values composite unique key sql server sql server composite unique key unique constraint multiple columns sql sql unique key tutorial sql server unique constraint create composite unique key sql server constraints tutorial