i want to do Oracle certification?

Question

HI! 

me michal i have joined the IT field before 2 years ago and have passed many IT certifications now i have a great desire to pass oracle certification any one would like give me proper info and from where an i get helping material for pass this certification i shall b very thanks if any one can give me refer the web address that from where i an get the helping material. its convenient for me and my future :-)