History of RDBMS
1970, IBM was implemented Dr.E.F.Codd's Concept and projected Relational Database
Management System Prototype Application is called System R that deploy with Structured
Query Language. 1974, System R developed and then enhanced the Prototype Application
into Commercial RDBMS is called System/38 (1979), SQL/DB (1981) and DB2 (1983).
1973, Eugence Wong and Michael Stonebraker was implemented Dr.E.F.Codd's Concept
and projected Open Source Relational Database Management System is called Berkeley
INGRES. This Open Source Relational Database Management System developed by University
of California, Berkeley.
1979, Berkeley INGRES developed and then enhanced the RDBMS into INGRES that implemented
Commercial and Government Agency. Late 1979, Postgres RDBMS developed based on INGRES.
2007, PostgreSQL Open Source Object Relational Database Management System developed
from Postgres.
Relational Software (ORACLE Corporation) was implemented Dr.E.F.Codd's Concept and
developed their own SQL based RDBMS. 1979, Relational Software Inc introduced the
first commercial RDBMS is called ORACLE Version 2 and implemented in U.S. Navy,
Central Intelligence Agency and other U.S. Government Agencies.
ORACLE Corporation enhanced ORACLE V2 into ORACLE 8.0 and then partially implemented
Object Oriented Concept and introduced an Object Relational Database Management
System is called ORACLE 8i.
1980, Relational Database Systems projected Informix and introduced in 1981.
1984, Sybase Inc developed Systemware that based on the INGRES Database Architecture
and marketed the product with Microsoft is called Sybase SQL Server. Sybase can
implement in UNIX and Window Operating System.
1989, Microsoft developed SQL Server that based on the Sybase SQL Server. MS SQL
Server can implement in Window Operating System.
1994, Michael Widenius and David Axmark projected MySQL and 1995, they founded MySQL
AB and introduced MySQL Open Source Relational Database Management System.
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