Question: The UNIQUE Constraint
Explore how to implement the UNIQUE constraint in SQL to ensure no duplicate employee names are allowed in the Employees table. This lesson helps you understand the role of constraints in maintaining data integrity and guides you through writing SQL queries to enforce uniqueness.
We'll cover the following...
We'll cover the following...
Question
Given the following Employees ...
Employees
EmpID | EmpName | Salary |
1 | Susan Lee | 50000.00 |
2 | Alexa Smith | 60000.00 |
3 | Dana Amberson | 45000.00 |
4 | Sarah Ronald | 47000.00 |
...