I am new to oracle. I don't have much experience in database.

I am thinking which database exam i should take: SQL server, Oracle or Sybase. Would u please advice? Is the market value of OCP higher than that of SQL database/Sybase certificate?

If I take the OCP exam,
Question 1: should I take 8i or 9i? (8i requires 5 exam but 9i only requires 4 exam)
Question 2: Do empolyers prefer candidates having 8i or 9i exam?

Thank your very much