Why is it the query arrangement different for SQRT and AVG? Can they use the same query arrangement

Question

SELECT Salary, SQRT(Salary) FROM employees;
SELECT AVG(Salary) FROM employees:

Answer 1

SQRT is used to calculate the square root of a number, while AVG is used for calculating average value from several values or in this case, column data.

I didn't clearly understand what you mean by "Can they use the same query arrangement". Can you elaborate on that part?