Tuesday, January 20, 2009

Oracle Certification Program

The Oracle Certification Program, a professional certification program, includes the administration of Oracle Databases as one of its main certification paths. It contains three levels:
1. Oracle Certified Associate (OCA)
2. Oracle Certified Professional (OCP)
3. Oracle Certified Master (OCM)

Oracle Database Features in Oracle 9i.

* AUTOMATICE WORKLOAD REPOSITORY (AWR), providing monitoring services to Oracle database installations from Oracle version 10. Previous releases of Oracle using the STATSPACK for facility provided similar functionality.
* ORACLE CLUSTERS
* DATAGUARD
* RESOURCE MANAGER (DRM), which controls the use of computing resources.
* DATA AUDITING standard security-auditing features
* FLASHBACK for selective data recovery and reconstruction
* iSQL*Plus, a web-browser-based graphical user interface (GUI) for Oracle database
* ORACLE MANAGED FILES (OMF) -- a feature allowing automated naming, creation and deletion of datafiles at the operating-system level.
* RECOVERY MANAGER (RMAN) for database backup, restoration and recovery
* SQL*Plus, a program that allows users to interact with Oracle database via SQL and PL/SQL commands on a command-line. Compare iSQL*Plus.

From the Beginning of Oracle

The Oracle database consists of a relational database management system (RDBMS) produced and marketed by Oracle Corporation. And Today, widely used in database OLTP Processing and database warehousing.

Since 1979 to till date, Several Versions of Oracle from Oracle Corporation.

* Oracle 2.0 , the first commercially-available SQL-based database (1979)
* Oracle 5.0 , the first distributed database (1986)
* Oracle 7.0, the first database product tested to comply with the ANSI SQL standard (1993)
* Oracle 7.0, the first 64-bit database (1995)
* Oracle 8i, the first web database (1997)
* Oracle 8i, the first database to incorporate a native JRE (1999)
* Oracle 9i, the first proprietary RDBMS to become available on Linux and also, supports XML (1999)
* From Oracle 10g, Oracle database supports to a wide variety of operating system platforms like,
Apple Mac OS X Server, HP-UX, HP Tru64 UNIX, HP OpenVMS, IBM AIX5L, Linux: x86, x86-64, PowerPC, zSeries, Itanium,
Microsoft Windows: x86, x86-64, Itanium , Sun Solaris: SPARC, x86, x86-64 etc.
* Oracle 11g, supports all Operating Systems and also for Oracle Applications Release 11i like Oracle e-Business Suite, Oracle Financials , etc. in 2007-2008.