Description: Fetching the 3rd highest salary in Oracle SQL is a common interview question, and here’s the simplest way to do it using a subquery. This method is easy to understand and implement:
Explanation:
Find the Highest Salary:
The innermost query fetches the maximum salary from the employees table.
Find the Second Highest Salary:
The middle query retrieves the maximum salary that is less than the highest salary.
Find the Third Highest Salary:
The outermost query calculates the maximum salary less than the second highest salary, giving the third highest salary.
Why This Method is Easy:
No need for complex ranking functions like ROW_NUMBER().
Uses only MAX and WHERE clauses, making it beginner-friendly.
This method is highly intuitive and works well for scenarios where you want the n-th highest salary without relying on advanced features.
Key Points for Your YouTube Video:
Visualize the query structure layer by layer using diagrams.
Highlight the simplicity of the approach.
Demonstrate the query in action using a sample employees table with data.
Explanation:
Find the Highest Salary:
The innermost query fetches the maximum salary from the employees table.
Find the Second Highest Salary:
The middle query retrieves the maximum salary that is less than the highest salary.
Find the Third Highest Salary:
The outermost query calculates the maximum salary less than the second highest salary, giving the third highest salary.
Why This Method is Easy:
No need for complex ranking functions like ROW_NUMBER().
Uses only MAX and WHERE clauses, making it beginner-friendly.
This method is highly intuitive and works well for scenarios where you want the n-th highest salary without relying on advanced features.
Key Points for Your YouTube Video:
Visualize the query structure layer by layer using diagrams.
Highlight the simplicity of the approach.
Demonstrate the query in action using a sample employees table with data.
Category
📚
Learning