Hi TOM group, Since yesterday I read the new version of Oracle 18c some of the elements like Analytical functions(As you said calculations), while reading I didn't find any examples to better understand about it like Rank_*...etc. I read the only theory part.Can I get a few examples from you to get better understand.it is great help for me sir, I wanna more interested to learning on 18c, which is an absolutely the great thing to us, a specially Oracle database part programmers.Thanks in advance.