I'm looking for information about different database-systems

Hello, as help to make a decision for the development of web-based database-applications I=92m looking for informations about different database-systems and their suitability for this purpose. Possible systems are Oracle, Informix, Adabas, mSQL, Sybase, Postgres, Access and SQL-Server. Maybe some of you are having experiences with one or more of these database-systems and are able to answer a few questions stated below. Thank you very much for every hint or tip you can give me. ----- Form ---- Administration: How complicated/extensive is the administration of this database-system? Performance: How fast is the access to this database-system? What is the response-time with complex queries and big datavolume? Datavolume: For which datavolume the database-system is qualified? =B7 up to __________________ records/tables or =B7 from __________________ records/tables Common: How common is the database-system? =B7 as a =84normal" system =B7 as a web-based database-system Comments about the web-interface: Others: Thank you very much for your efforts! -- = Germar Krueger. email: germar@intercessio.de