text: /*Select all data from the “employees” table.*/
  SELECT *
  FROM employees
  
  /*Select all people from the “employees” table whose first name is “Alex”.*/
  SELECT *
  FROM employees
  WHERE first_name LIKE '%Alex%';
  
  /*Retrieve employee with last name is "Hunold" and "Khoo".*/
  SELECT *
  FROM employees
  WHERE	last_name IN ('Hunold', 'Khoo');
  
  /*Retrieve employee with last name is "Hunold" and "Khoo".*/
  SELECT *
  FROM employees
  WHERE last_name IN ('Hunold', 'Khoo');
  
  /*Select all employee who is join in year "1995" and have salary higher than "10000".*/
  SELECT *
  FROM employees
  WHERE EXTRACT(YEAR FROM hire_date) = 1995 AND salary > 10000 ;
  
  /*Select all employee that earning salary between "5000" to "10000".*/
  SELECT *
  FROM employees
  WHERE salary BETWEEN 5000 AND 10000 ;
  
  /*Sort all employee by highest salary.*/
  SELECT *
  FROM employees
  ORDER BY salary DESC; 
  
  /*Sort all employee by highest salary and choose only for 10 employee.*/
  SELECT *
  FROM employees
  ORDER BY salary DESC
  LIMIT 10; 
  