I AM RUNNING A SMALL BUSINESS WITH 50 PEOPLE OR LESS AND I HAVE A CHOICE BETWEEN 4 DATABASE SYSTEMS FOR MY BUSINESS. WHICH WOULD BE THE BSET FOR MY COMPANY?
1. ORACLE 11g
2. DB2 Universal DataBase ( IBM )
3. SOL Server 2005 ( Microsoft )
4. Sybase Adaptive Server Enterprise

PLEASE EXPLAIN EACH SYSTEM, ADVANTAGE AND DISADVANTAGE OF THESE ABOVE DB MGMT SYSTEM.