It is obligatory to have a degree either in Computer Science or in Management Information System besides a Certificate in Data Base. Moreover having good knowledge in Logic, Computer and Mathematics is essential. However, you must bear in mind that it is difficult to obtain jobs merely with qualifications alone.
Initially you join an IT company. There you learn how to use database and operating systems of organization. Acquire an additional qualification related to your field at least through correspondence.
Attain skills in specific database, design and realization. Exhibit your skills at your working place. When the company identifies your skills in Database Management you will be able to accomplish the responsibilities bestowed on you wonderfully well.