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Q. |
The effect of the ROLLBACK command in a transaction is the following _ |
A. | Undo all changes to the data-base resulting from the execution of the transaction |
B. | Undo the effects of the last UPDATE command |
C. | Restore the content of the database to its state at the end of the previous day |
D. | Make sure that all changes to the database are in effect |
E. | None of these |
Answer» A. Undo all changes to the data-base resulting from the execution of the transaction |
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