i. Oracle – Target market is middle-tier and top-tier (large) customers which use any kind of OS. High percentage of UNIX and Linux top-tier customers are using Oracle. Windows top-tier customers also use Oracle.
ii. Ms SQL Server – For any customers who uses windows
iii. Ms Office Access – For bottom-tier (small) customers who uses windows OS. Develop for basic use data management.
iv. MySQL – For any middle and top-tier customers of using any OS. But got high demand in open source OS users and also some demand from web developers (WAMP, LAMP).
v. PostgreSQL – For any middle and top-tier customers of using any OS. But got demand in open source OS users. Still not much familiar with other platform users rather than open source programmers.
vi. Caché – Target market of Caché is middle and top customers. Notable customers of this DBMS are many
vii. Objectivity/DB – For top-tier customers like government, security, complex manufacturing, commercial services, science, and engineering organizations.