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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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