| Transactions and Buffering |
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| u | Data
on disk should always be complete and |
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| consistent. |
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| u | Buffering
allows you to make a series of |
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| changes,
and have the data in local cursors |
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| until
you are ready to commit it. |
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| u | Transactions
allow you to lock the affected |
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| records
from the time you start and update |
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| until
you complete it. |
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