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This approach uses the SQL query constructs to fetch the nth highest salary directly from the database. We will utilize ORDER BY, DISTINCT, LIMIT, and OFFSET to achieve this.
Steps:
SELECT DISTINCT.ORDER BY salary DESC.LIMIT and OFFSET to skip the first n-1 results and take the nth result if it exists.1/* Placeholder function for SQL query in C# */
2public string GetNthHighestSalarySQL(int n)
3{
4 return $"SELECT DISTINCT salary FROM Employee ORDER BY salary DESC LIMIT 1 OFFSET {n-1}";
5}
6
7// Implement actual execution using ADO.NET or any ORM.This C# method returns an SQL query string. The query needs to be executed in database through ADO.NET or any ORM framework.
In this approach, we will use the DENSE_RANK() window function available in SQL to assign ranks to salaries based on their value.
Steps:
DENSE_RANK by partitioning properly.n.
This Java method constructs an advanced SQL query using the DENSE_RANK function, which ranks salaries and retrieves the nth highest ranked salary. Execution requires a database backend with SQL window function support.