I’m guessing the target markets of some DBMSs 2009

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 OSs. But mainly got high demand from middle-tier customers. It is easy to use by windows users and they are much familiar with the Ms SQL Server.

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 US hospitals, who run their Electronic Medical Record systems using Caché and financial institutions.

vii. Objectivity/DB – For top-tier customers like government, security, complex manufacturing, commercial services, science, and engineering organizations.

About several relational DBMSs

i. OracleOracle is a top relational database management system which is developed by Oracle Corporation. It is written in C. First release date is November 1979. It also has object-relational features. PL/SQL, SQL languages are can use.

ii. Microsoft SQL Server – Ms SQL Server is a relational database management system which is developed by Microsoft Corporation. It is only supports Ms Windows’s operating systems. Its primary query languages are ANSI, SQL, and T-SQL. First release date is 1989.

iii. Microsoft Office Access – This is a member of the Ms Office suite of applications which is developed by Microsoft and is included in the Professional and higher versions for Windows and sold separately. It is a relational database management system. First release date is 1992.

iv. MySQL – MySQL is a relational database management system which is developed by MySQL AB and Sun Microsystems. It is written in C, C++. First release date is November 1996. It is open source program.

v. PostgreSQL – PostgreSQL is an object-relational database management system. It is controlled by a global community of developers and companies (PostgreSQL Global Development Group). It is written in C. First release date is June 1989.

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