Trying to display the tutor names who salary is higher than the average salary

Question

What I try to do is

SELECT tName, avg(Tutor.salary) AS avgSalary
FROM Tutor
GROUP BY tName
HAVING Tutor.salary > avgSalary;

Answer 1

Since your question is incomplete, I assume you have columns tName and salary in table Tutor . What you want to do is extract the average and then compare:

SELECT tName, salary FROM Tutor
WHERE
salary > (SELECT avg(salary) FROM Tutor);