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Question
Recovering a database via reprocessing involves ________.A) restoring the database from the save and reprocessing all the transactions since the save
B) restoring the database from the save and reapplying all the changes made by transactions since the save
C) undoing the changes made by erroneous or partially processed transactions and restarting the valid transactions that were in process at the time of the failure
D) recreating the database by reentering all of the data from the beginning, and then reprocessing all of the transactions
Answer
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Related questions
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Suppose you have created a data model for an airline based on a variety of forms, reports, user interviews, data sources, etc. Your client comes forward with a new desired report that includes passenger weights and a relationship between passengers and employees, neither of which is in your E-R diagram. You should ________.
A) create a new, separate E-R diagram with just the new information
B) add the relationship and the weight attribute to the existing data model
C) add the relationship but not the weight attribute
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ID-dependent entities are a common type of weak entity.
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An entity that represents something that can exist on its own is called a strong entity.
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Q:
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B) limits the number of rows retrieved from a table
C) limits the number of tables retrieved from a database
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