Some free software ER diagramming tools

RISE Editor

http://www.risetobloome.com/

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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