Oracle cdc change table column - cscn vs rsid

Hi all,
I am not able to understand the differences between the CSCN field vs the RSID field. Looking up internet guides it said:
RSID is the Unique row sequence ID within this transaction. The RSID$ column reflects an operation's capture order within a transaction, but not across transactions. The publisher cannot use the RSID$ column value by itself to order committed operations across transactions; it must be used in conjunction with the CSCN$ column value.
Can anyone explain to me in simplier terms what the CSCN field stand for? Also, why cant we use the timestamp$ field to order the operations?
Also, for a row in the change table, are we able to determine which column in the row changed first?
Edited by: user8915380 on 04-May-2010 03:22

Hi,
you can wait for 11gR2 with CDC integration or build most of the code outside the owb. To use CDC you must do this things (http://www.oracle.com/technology/oramag/oracle/03-nov/o63tech_bi.html):
1. Identify the source tables.
2. Set up a publisher.
3. Create change tables.
4. Set up a subscriber.
5. Subscribe to the source tables, and activate the subscription.
6. Set up the CDC window.
7. Prepare a subscriber view.
8. Access data from the change tables.
9. Drop the subscriber view, and purge the CDC window.
10. Repeat steps 6 through 9 to see new data.
You can do only a few of this inside owb, most of it must be done outside.
Regards,
Detlef

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you can wait for 11gR2 with CDC integration or build most of the code outside the owb. To use CDC you must do this things (http://www.oracle.com/technology/oramag/oracle/03-nov/o63tech_bi.html):
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