Information about Oracle licensing is not abundantly available. Most of us might not be familiar with Oracle licensing. This article provides information about Oracle Licensing Rules and Definitions. This is Part 1 – License Metric (Oracle Technology). Please look at the disclaimer and agree before reading.

You can choose between a license based on a ‘User’ or based on server-specifications which is ’Processor’. A user-based license is called Named User Plus. So, two common license metrics are Named User Plus and Processor. I will explain a little more about the definitions.

During my experiences with different environments, I have been tasked with maintaining passwords for different information systems. This includes operating system accounts (root, oracle, administrator) and Database accounts (sys, system, dbsnmp).

It can be sometimes difficult to remember many different passwords. I have seen some people overcome this by documenting the passwords, sometimes just in a plaintext file, sometimes encrypted, sometimes just on a ‘Post-It’ Note under the keyboard.

I try and retain the passwords in memory.

Part of my job is teaching for Oracle University, and I'm often asked about OCP exam technique. Here are a few hints. The OCM exam is very different, and the confidentiality rules forbid me from discussing it, so please don't ask.

Everyday most of us deal with multiple string functions in Sql. May it be for truncating a string, searching for a substring or locating the presence of special characters.

The regexp functions available in Oracle 10g can help us achieve the above tasks in a simpler and faster way.

Working with LDAP has made me appreciate the maturity of the Oracle RDBMS. That said, LDAP is pretty popular it seems. To that end my cohort in crime Dave Smith and I (Kevin Meade) have been tasked with many a work request to update LDAP entries related to database data. In integrating our databases and LDAP via the DBMS_LDAP package we came across this error. A quick Internet search revealed lots of people with the same error but no answers. It turns out that the error is exactly what it says it is, but that finding the reason for it is another matter. Here we discuss what we think the error means and the three most likely ways to get it.

Today I planned to test “Recover the datafile without prior backup”

Currently there is no failure in database. I shutdown the database & removed the below datafile in OS level “D:\ORACLE\APP\ORADATA\CHE\TEST.DBF”.

Note:

1.Database must be in archive log mode.
2.We need all the archive log files from lost datafile created.

1.Login into che database

C:\>set oracle_sid=CHE

SQL*Plus: Release 11.1.0.7.0 - Production on Wed May 19 14:21:03 2010

Copyright (c) 1982, 2008, Oracle.

What is Recycle Bin
Oracle has introduced "Recycle Bin" Feature Oracle 10g to store all the dropped objects.
If any table in Oracle 10g is dropped then any associated objects to this table such as indexes,
constraints and other dependant objects are simply renamed with a prefix of BIN$$.

Why Recycle Bin
A user drops a very important table--accidentally, of course--and it needs to be revived as soon as possible.

Oracle Data Recovery Advisor 11g new feature

Data recovery advisor is one of the oracle 11g new features.

The Data Recovery Advisor tool can assist with diagnosing media failures, making recommendations and providing the RMAN commands to resolve the problem.

Data Recovery advisor we have used three commands.

1.List failure
2.Advice failure
3.Repair failure

How it works?

1.List failure:

The Data Recovery Advisor stores its information outside the database in the Automatic Diagnostic Repository (ADR - V$diag_info)

If you find any problem in database and Data recovery a

Sometime is necessary to move all database objects from one tablespace to another.

Basically are tables, indexes and lobs.

This script permit move database objects from one user and/or tablespace to another:

[code]
set echo off
set heading off

var tbs_source varchar2;
var tbs_dest varchar2;
var schema_user varchar2;

-- '' if it isn't relevant.
exec :tbs_source := 'SOURCE_TBS';
-- '' if it isn't relevant.
exec :schema_user := 'SOURCE_USER';
exec :tbs_dest := 'DEST_TBS';

select 'Transporting tablespace ' || :tbs_source || ' or user ' || :schema_user || ' to tables

Security is gaining importance. As per the reports in the year 2008, loss of confidential information has increased to 63%. This loss of confidential information is a breach of Service Level Agreement (SLA). Organizations will have to compensate these loses in the form of financial penalties.
A recent information protection law from a state in U.S.A claims that information of residents of this state stored in databases across the globe will have to be encrypted. Upon failure, the database owners will have to pay $5000 penalty.