Write a store procedure that gets an integer number n and calculates and displays its factorial. Example: 0! = 1 2! = fact(2) = 2 * 1 = 1 3! = fact(3) = 3 * 2 * 1 = XXXXXXXXXXn! = fact(n) = n * (n-1)...

Write a store procedure that gets an integer number n and calculates and displays its factorial. Example: 0! = 1 2! = fact(2) = 2 * 1 = 1 3! = fact(3) = 3 * 2 * 1 = 6 . . . n! = fact(n) = n * (n-1) * (n-2) * . . . * 1

by oracle sql ,plz give me a explain