How we can understand about this statement:
"All aggregate functions are deterministic"?
a. This means aggregate functions return the same value any time they are called by using a specific set of input values
b. This means aggregate functions return the different values each time they are called by using a specific set of input values
c. This means aggregate functions return the same value any time they are called by using any set of input values
d. None of the others
Answer: A