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Oracle DBA FAQ - Oracle Basic Concepts

By: FYIcenter.com

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(Continued from previous part...)

What Is a Dynamic Performance View?

Oracle contains a set of underlying views that are maintained by the database server and accessible to the database administrator user SYS. These views are called dynamic performance views because they are continuously updated while a database is open and in use, and their contents relate primarily to performance. Although these views appear to be regular database tables, they are not. These views provide data on internal disk structures and memory structures. You can select from these views, but you can never update or alter them.

What Is a Recycle Bin?

Recycle bin is a logical storage to hold the tables that have been dropped from the database, in case it was dropped in error. Tables in recycle bin can be recovered back into database by the Flashback Drop action. Oracle database recycle save the same purpose as the recycle bin on your Windows desktop.

Recycle bin can be turned on or off in the recyclebin=on/off in your parametere file.

What Is SQL*Plus?

SQL*Plus is an interactive and batch query tool that is installed with every Oracle Database Server or Client installation. It has a command-line user interface, a Windows Graphical User Interface (GUI) and the iSQL*Plus web-based user interface.

What Is Transport Network Substrate (TNS)?

TNS, Transport Network Substrate, is a foundation technology, built into the Oracle Net foundation layer that works with any standard network transport protocol.

What Is Open Database Communication (ODBC)?

ODBC, Open Database Communication, a standard API (application program interface) developed by Microsoft for Windows applications to communicate with database management systems.

Oracle offers ODBC drivers to allow Windows applications to connect Oracle server through ODBC.

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