Sachin,

If you had finished the MCDBA course you would be eligible for one upgrade exam. But as it is, you will probably have to sit for all the exams in the MCITP: Database administrator.

-------

and just to second what has been said in the article, practise, practise and more practise please. And also to mention that the exam fees varies depending on the region you will be sitting the exam. e.g. in UK its £89 (i think), in Africa its £56, but the good news is its still the same exam