Is there an important difference on why the emp_no was chosen instead of salary? As far as I know, I'm getting the same results as your solution, I'm just wondering if there is something I'm missing. Code I used: USE employees; SELECT salary, COUNT(salary) AS emps_with_same_salary FROM salaries WHERE salary > 80000 GROUP BY salary ORDER BY salary DESC;

Hi Louis! Thanks for reaching out. You can use this column as well. Since the columns have the same length and do not contain NULL values the result set will be the same. Hope this helps. Best, Tsvetelin

Hi, you both! I wrote the same query as @Louis. @Tsvetelin: what you said is due to salary column could contain null values, is it better to use the emp_no column? Or is the goal to use the primary key? Thanks in advance! :)