Prentice Hall Oracle Plsql By Example 3Rd Edition [Electronic resources] نسخه متنی

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Prentice Hall Oracle Plsql By Example 3Rd Edition [Electronic resources] - نسخه متنی

Benjamin Rosenzweig

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Lab 4.2 Self-Review Questions


In order to test your progress, you should be able to answer the following questions.

1)

User A can ROLLBACK User B's insert statement.

  • _____ True

  • _____ False

  • 2)

    When a COMMIT has been issued, which of the following are true? (Choose all that apply.)

  • _____ All memory holds on the data have been released.

  • _____ All data inserts are available to other users.

  • _____ You have to get married.

  • _____ The transaction is not finished because SQL statements are still pending.

  • 3)

    What defines a logical unit of work?

  • _____ From one SAVEPOINT to the next.

  • _____ From one ROLLBACK to the next.

  • _____ From one COMMIT to the next.

  • _____ All of the above.

  • 4)

    Which of the following is an advantage of using SAVEPOINTS in a PL/SQL block?

  • _____ It prevents inconsistent data.

  • _____ It allows one to group code into manageable units.

  • _____ It prevents one from duplicating a primary key.

  • _____ It locks rows and prevents other users from updating the same row.

  • Answers appear in Appendix A,

    Section 4.2 .


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