text: /*
  Often your results will include many duplicate values. If you want to select all the unique values from a column, you can use the DISTINCT keyword.
  
  This might be useful if, for example, you're interested in knowing which languages are represented in the films table:
  
  SELECT DISTINCT language
  FROM films;
  Remember, you can check out the data in the tables by clicking on the tabs to the right under the editor!
  */
  
  /*
  Instructions
  - Get all the unique countries represented in the films table.
  - Get all the different film certifications from the films table.
  - Get the different types of film roles from the roles table.
  */
  
  SELECT DISTINCT country FROM films
  
  SELECT DISTINCT certification FROM films
  
  SELECT DISTINCT role FROM roles