Oracle 10g R2 vs Oracle 10g;;;Plz Help Me

Hi all;
I'm preparing my first OCA exam ; Oracle Database 10g: Administration I. I 'm doing my preparation basically from 2 books ; Sybex Book OCA-Exam and All-in-One Exam Guide book.
Both books 're based on the first release of Oracle 10g.
My questions 're :
- What's the diffrence between Oracle 10g R2 vs Oracle 10g R1?
- What's New in Oracle 10g R2 (parameters, default parameters values, features...)?
thanks a lot,
Best REgards,
W
Edited by: OracleJavaLinux on Oct 30, 2008 8:01 AM

Well satish has given link for the difference in both the versions. I shall add to this that at this moment of writing,there is not anything which makes the exams depend on the release 2.The sybex books would be good enough but I shall recommend to attend Oracle Univ training for the same.
You can go ahead with the exam by preparing from these books, no issues would be there.
HTH
Aman....

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>
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