Nth Highest Salary solution and explanation

# Placeholder function for SQL query in Python
def get_nth_highest_salary_sql(n):
    return f"SELECT DISTINCT salary FROM Employee ORDER BY salary DESC LIMIT 1 OFFSET {n-1}"

# Execute this query using a Python SQL library like sqlite3 or SQLAlchemy.

/* Placeholder function for SQL query in Java */
public String getNthHighestSalary_SQL(int n) {
    return "SELECT DISTINCT salary FROM Employee ORDER BY salary DESC LIMIT 1 OFFSET " + (n-1);
}

// Use JDBC for executing this query in a database environment.

/* Placeholder function for SQL query in C++ */
#include <iostream>
#include <string>

std::string getNthHighestSalary_SQL(int n) {
    return "SELECT DISTINCT salary FROM Employee ORDER BY salary DESC LIMIT 1 OFFSET " + std::to_string(n-1);
}

/* Run this query in a SQL database system using a library like MySQL Connector/C++. */

// Placeholder function for SQL query in JavaScript
function getNthHighestSalarySQL(n) {
    return `SELECT DISTINCT salary FROM Employee ORDER BY salary DESC LIMIT 1 OFFSET ${n - 1}`;
}

// Use Node.js MySQL or another SQL execution environment to run this query.

/* As SQL query requires running in a database environment, this is a placeholder function */
#include <stdio.h>

/* In a database environment, use this SQL query directly */
const char* getNthHighestSalary_SQL(int n) {
    return "SELECT DISTINCT salary FROM Employee ORDER BY salary DESC LIMIT 1 OFFSET ?";
}

/* Explanation: This function returns the SQL query as a string. The actual execution needs to be done in an SQL environment. */

/* Placeholder function for SQL query in C# */
public string GetNthHighestSalarySQL(int n)
{
    return $"SELECT DISTINCT salary FROM Employee ORDER BY salary DESC LIMIT 1 OFFSET {n-1}";
}

// Implement actual execution using ADO.NET or any ORM.

# Advanced SQL execution placeholder in Python
def get_nth_highest_salary_dense_rank_sql(n):
    return f"SELECT salary FROM (SELECT salary, DENSE_RANK() OVER (ORDER BY salary DESC) as rank FROM Employee) Ranked WHERE rank = {n}"

# Use this query in database environments supporting SQL window functions.

/* Execute this advanced SQL using Java's JDBC */
public String getNthHighestSalary_DenseRankSQL(int n) {
    return "SELECT salary FROM (SELECT salary, DENSE_RANK() OVER (ORDER BY salary DESC) as rank FROM Employee) as Ranked WHERE rank = " + n;
}

// Requires database back-end support for window functions.

/* Placeholder for advanced SQL execution in C++ */
#include <iostream>
#include <string>

std::string getNthHighestSalary_DenseRankSQL(int n) {
    return "SELECT salary FROM (SELECT salary, DENSE_RANK() OVER (ORDER BY salary DESC) as rank FROM Employee) as Ranked WHERE rank = " + std::to_string(n);
}

/* Execute within SQL database systems supporting advanced SQL functions */

// Placeholder for executing advanced SQL with JavaScript
function getNthHighestSalaryDenseRankSQL(n) {
    return `SELECT salary FROM (SELECT salary, DENSE_RANK() OVER (ORDER BY salary DESC) as rank FROM Employee) Ranked WHERE rank = ${n}`;
}

// Implement execution in SQL supported environments.

/* Placeholder function for advanced SQL query in C */
#include <stdio.h>

/* In an actual database system, execute the following SQL statement */
const char* getNthHighestSalary_DenseRankSQL(int n) {
    return "SELECT salary FROM (SELECT salary, DENSE_RANK() OVER (ORDER BY salary DESC) as rank FROM Employee) as Ranked WHERE rank = ?";
}

/* Run this SQL query within a relational database to get the result. */

/* Placeholder for executing advanced SQL in C# */
public string GetNthHighestSalaryDenseRankSQL(int n) {
    return $"SELECT salary FROM (SELECT salary, DENSE_RANK() OVER (ORDER BY salary DESC) as rank FROM Employee) Ranked WHERE rank = {n}";
}

// Requires use of database frameworks capable of SQL window functions.

CREATE FUNCTION getNthHighestSalary(N INT) RETURNS INT
BEGIN
    SET N = N - 1;
  RETURN (
      # Write your MySQL query statement below.
      SELECT (
          SELECT DISTINCT salary
          FROM Employee
          ORDER BY salary DESC
          LIMIT 1 OFFSET N
      )
  );
END