RDBMS Comparisons and Their Statistics

Hi there, I am in the process of evaluating a Relational Database (ORACLE, SYBASE, Informix, SQL Server) for using as Backend in our project. Our project will contain number of modules (10 Modules) and the application will be integrated with World Wide Web(WWW). My company is an Internet Service Provider. Is there anybody, who can help me to find the Best RDBMS. I require Information like:- 1. CPU Utilization and Response Time of the Database. 2. World Market share of RDBMS in Percentage 3. Transaction Per Minute (tpmC) 4. Compatibility with hetrogeneous systems 5. Integration capability with Internet/Intranet tools. 6. Integration capability with Network Management Software 7. Scalability 8. Connectivity to Off-The-Shelf Applications (like Accounting) 9. Downtime. 10. Reliability. 11. Vendor Support. 12. Integration with Third Party GUI Tools. 13. Openness (Connectivity to other Database). 14. Migration Facility. 15. Best Operating System for the Database. 16. Volume of Data Supported and it's performance. -- Kumar Chidambaram [ Pacific Internet Pte Ltd Database System Analyst 89 Science Park Drive #04-09/12 The Rutherford, Singapore 118261 Tel : (65) 771 0860 Fax : (65) 773 6812 ]