I am stuck , help please .

This is my attempt so far :::

Select * company-name From works where salary > (Select avg(salary) from works)

Consider the relational database schema described below, where the primary keys are underlined and foreign keys are in bold: employee (person-name, street, city) works (person-name, company-name, salary) company (company-name, city) manages (person-name, manager-name) Write a query to find those companies whose employees earn a higher salary, on average, than the average salary at 'UC Denver