System Change Number in Oracle Database - SCN - DBArch Video 26

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In this video you will understand what is System Change Number in an Oracle Database, and get to know about some of the uses of it. .

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  1. Ramkumar Swaminathan
  2. Oracle
  3. Oracle Database
  4. Oracle SCN
  5. Oracle System Change Number
  6. System Change Number
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Комментарии
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Person having no background or experience of Oracle Database can watch, understand your videos and clear an interview for job..
I really like your way of teaching. Its God's gift :)

syedyasirali
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Thank you for such an crisp tutorial.
About the rollback from redo log, is it possible for DBWr process to write uncommitted buffer cache blocks to data files?

PANKAJGOEL
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Does rollback transaction also has scn number associated to it? Can you please reply sir

nagakeerthi
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Sir in the instance recovery video u said that rollforward happens with the committed un-checkpointed changes in the redo log.and roll back happens with the uncommited uncheckpointed changes ...Here u are saying rollforward happens with the not committed changes????Please clear...

syedamunawarfatima
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This was one of the confusing video of the course, i was reading OCA book, there it was written only transaction which is committed gets a SCN, but here sir saying every activity gets an SCN, nd in one of the replies Sir saying SCN gets committed for a commit, If anyone can explain will be helpful.

dalipkhurana
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How about if the DB is IDLE, Will it change or not?

anandparthasarathy
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Sir in multi transaction vedio u said that SCN is only generate when commit is occur
In this vedio u saying that if any event occure like dml, ddl, select then scn is generate.

sachintiwari