Extraction from Oracle

Hello Experts,
As some of might already know that I'm new to complex extractions. Hence, the question:
What are basic steps/tools needed to extract from Oracle.
and
What are the main challenges?
I would really appreciate if someone could share some experience in a general context.
Thanks
Fran

Fran
Please see this link
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/2f0fea94-0501-0010-829c-d6b5c2ae5e40
Also have a look at this thread which already discussed
how create a db connection between oracle and bw
Hope this helps
Thnaks
sat

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Dear Team,
I am very newer in Golden Gate. Going thru with the blog and trying to learn.
http://www.pythian.com/news/7959/oracle-goldengate-installation-part-1/
I was trying to extract from the Oracle tables at the time of extraction
it’s giving error which are:-
1.     2011-02-01 10:20:16 ERROR OGG-00685 begin time Jan 28, 2011 1:48:12 PM prior to oldest log in log history. Last SQL executed <SELECT 1 FROM dual WHERE TO_DATE(:begin_time,'YYYY-MM-DD HH24:MI:SS') < (SELECT MIN(first time) FROM v$log_history WHERE thread# = :ora_thread)>.
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log file details are:-
Oracle GoldenGate Capture for Oracle
Version 11.1.1.0.0 Build 078
Windows (optimized), Oracle 10 on Jul 28 2010 15:50:58
Copyright (C) 1995, 2010, Oracle and/or its affiliates. All rights reserved.
Starting at 2011-02-01 10:20:14
Operating System Version:
Microsoft Windows XP Professional, on x86
Version 5.1 (Build 2600: Service Pack 3)
Process id: 1064
Description:
** Running with the following parameters **
extract ext1
userid ggate, password ********
rmthost INFVA04159.vshodc.lntinfotech.com, mgrport 7809
rmttrail /goldenGate/dirdat
ddl include mapped objname sender.*;
table sender.*;
2011-02-01 10:20:14 INFO OGG-01635 BOUNDED RECOVERY: reset to initial or altered checkpoint.
Bounded Recovery Parameter:
Options = BRRESET
BRINTERVAL = 4HOURS
BRDIR = C:\GoldenGate
CACHEMGR virtual memory values (may have been adjusted)
CACHEBUFFERSIZE: 64K
CACHESIZE: 1G
CACHEBUFFERSIZE (soft max): 4M
CACHEPAGEOUTSIZE (normal): 4M
PROCESS VM AVAIL FROM OS (min): 1.81G
CACHESIZEMAX (strict force to disk): 1.59G
Database Version:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Prod
PL/SQL Release 10.2.0.1.0 - Production
CORE     10.2.0.1.0     Production
TNS for 32-bit Windows: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 - Production
Database Language and Character Set:
NLS_LANG environment variable specified has invalid format, default value will be used.
NLS_LANG environment variable not set, using default value AMERICAN_AMERICA.US7ASCII.
NLS_LANGUAGE = "AMERICAN"
NLS_TERRITORY = "AMERICA"
NLS_CHARACTERSET = "WE8MSWIN1252"
Warning: your NLS_LANG setting does not match database server language setting.
Please refer to user manual for more information.
2011-02-01 10:20:15 WARNING OGG-01423 No valid default archive log destination directory found for thread 1.
2011-02-01 10:20:15 INFO OGG-01515 Positioning to begin time Jan 28, 2011 1:48:12 PM.
Source Context :
SourceModule : [er.redo.ora.metathr]
SourceID : [er/redo/oracle/ocimetathr.c]
SourceFunction : [OCIMETATHR_get_sequence]
SourceLine : [771]
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2011-02-01 10:20:16 ERROR OGG-01668 PROCESS ABENDING.
Edited by: user2855889 on Feb 1, 2011 1:33 AM

This is a startup bug error where certain initial log positions are not resolved at initialization.
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It is bug (11839680).
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Message was edited by:
Shail
Message was edited by:
Shail

Well I and eveyone know that it can be done in BI.
I apologize that I did not mention it in my question.
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Imran Soudagar wrote:
Hi,
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Extraction from Oracle

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