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Oracle Tutorials - Transaction Commit When Session Ended

By: FYIcenter.com

(Continued from previous topic...)

What Happens to the Current Transaction If the Session Is Ended?

If a session is ended, the current transaction in that session will be committed and ended. All the database changes made in the current transaction will become permanent. This is called an implicit commit when session is ended. The following tutorial exercise shows you that the "disconnect" command forces the current transaction to be committed and ended. When the session is reconnected, you can see the changes made by the UPDATE statements.

SQL> connect HR/fyicenter

SQL> UPDATE fyi_links SET url = 'FYICENTER.COM'
  2  WHERE id = 101;
  
SQL> UPDATE fyi_links SET url = 'CENTERFYI.COM' 
  2  WHERE id = 110;

SQL> disconnect
SQL> connect HR/fyicenter

SQL> SELECT * FROM fyi_links;
     ID URL              NOTES          COUNTS CREATED
------- ---------------- ---------- ---------- ---------
    101 FYICENTER.COM                          07-MAY-06
    110 CENTERFYI.COM                          07-MAY-06
    112 oracle.com                             07-MAY-06
    113 sql.com                                07-MAY-06

(Continued on next topic...)

  1. What Is a Transaction?
  2. How To Start a New Transaction?
  3. How To End the Current Transaction?
  4. How To Create a Test Table for Transaction Testing?
  5. How To Commit the Current Transaction?
  6. How To Rollback the Current Transaction?
  7. What Happens to the Current Transaction If a DDL Statement Is Executed?
  8. What Happens to the Current Transaction If the Session Is Ended?
  9. What Happens to the Current Transaction If the Session Is Killed?
  10. How Does Oracle Handle Read Consistency?
  11. What Is a READ WRITE Transaction?
  12. What Is a READ ONLY Transaction?
  13. How To Set a Transaction To Be READ ONLY?
  14. What Are the Restrictions in a READ ONLY Transaction?
  15. What Are the General Rules on Data Consistency?
  16. What Are Transaction Isolation Levels Supported by Oracle?
  17. What Is a Data Lock?
  18. How Data Locks Are Respected?
  19. How To Experiment a Data Lock?
  20. How To View Existing Locks on the Database?
  21. What Is a Dead Lock?
  22. How Oracle Handles Dead Locks?

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