Which SQL keyword is used to retrieve a maximum value?

 In the context of SQL, the keyword used to retrieve all the maximum values from a particular Column in a database table is MAX(). Here is an example of how you can use it in a query:-

SELECT MAX(salary) AS max_salaryFROM employee;
In this example:

The MAX() would help in calculating the maximum value in the salary Column of the employee table.

AS max Salary would help in assigning an alias max _ salary for getting the results, which can be useful for the readability or even further processing in your particular application.

This particular query would return a single row with the highest salary which is found in the tables called Employees under the column alias max_salary.

Here is also a java based program given of how you can retrieve the maximum value from a particular Database by using the JDBC:-

Import java.sql.Connection;
Import java.sql.DriverManager;
Import java.sql.PreparedStatement;
Import java.sql.ResultSet;
Import java.sql.SQLException;

Public class MaxValueExample {
    // JDBC URL, username, and password of MySQL server
    Private static final String JDBC_URL = “jdbc:mysql://localhost:3306/your_database_name”;
    Private static final String JDBC_USER = “your_username”;
    Private static final String JDBC_PASSWORD = “your_password”;
    // SQL query to retrieve maximum salary from employee table
    Private static final String SQL_QUERY = “SELECT MAX(salary) AS max_salary FROM employee”;
    Public static void main(String[] args) {
        // Establishing a connection to the database
        Try (Connection connection = DriverManager.getConnection(JDBC_URL, JDBC_USER, JDBC_PASSWORD);
             PreparedStatement statement = connection.prepareStatement(SQL_QUERY);
             ResultSet resultSet = statement.executeQuery()) {
            // Processing the result set
            If (resultSet.next()) {
                Double maxSalary = resultSet.getDouble(“max_salary”);
                System.out.println(“Maximum salary in the employee table: “ + maxSalary);
            } else {
                System.out.println(“No records found in the employee table.”);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}

Here is also a Python-based example given below by using the MySQL-connector library to connect to a MySQL database and retrieving the maximum Salary from an employee table:-

Import mysql.connector

# Database connection configuration

Config = {
    ‘host’: ‘localhost’,
    ‘user’: ‘your_username’,
    ‘password’: ‘your_password’,
    ‘database’: ‘your_database_name’
}
# SQL query to retrieve maximum salary
Sql_query = “SELECT MAX(salary) AS max_salary FROM employee”
Try:
    # Establishing a connection to the database
    Connection = mysql.connector.connect(**config)
    # Creating a cursor object using the connection
    Cursor = connection.cursor()
    # Executing the SQL query
    Cursor.execute(sql_query)
    # Fetching the result
    Result = cursor.fetchone()
    # Processing the result
    If result:
        Max_salary = result[0]
        Print(f”Maximum salary in the employee table: {max_salary}”)
    Else:
        Print(“No records found in the employee table.”)
Except mysql.connector.Error as error:
    Print(f”Error connecting to MySQL: {error}”)

Finally:

    # Closing cursor and connection
    If ‘cursor’ in locals() and cursor:
        Cursor.close()
    If ‘connection’ in locals() and connection.is_connected():
        Connection.close()