October 2002
Beginner
864 pages
18h 41m
English
Content preview from Sams Teach Yourself SQL in 21 Days, Fourth Edition
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Day 12
Quiz
| 1: | When nesting transactions, does issuing a ROLLBACK TRANSACTION command cancel the current transaction and roll back the batch of statements into the upper-level transaction? Why or why not? |
| A1: | No. When nesting transactions, any rollback of a transaction cancels all the transactions currently in progress. The effect of all the transactions will not truly be saved until the outer transaction has been committed. |
| 2: | Can savepoints be used to “save off” portions of a transaction? Why or why not? |
| A2: | Yes. Savepoints allow the programmer to save off statements within a transaction. If desired, the transaction can then be rolled back to this savepoint instead of to the beginning of the transaction. |
| 3: | Can a COMMIT command be used by itself ... |
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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