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Author Question: To support rollforward and rollback recovery, transactions must be written to a script before they ... (Read 104 times)

ss2343

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on: Jul 7, 2018
To support rollforward and rollback recovery, transactions must be written to a script before they are applied to the database.
 
  Indicate whether the statement is true or false

Question 2

What are inconsistent values, and why are they a problem?
 
  What will be an ideal response?


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memslove

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Reply #1 on: Jul 7, 2018
Answer to Question 1

FALSE

Answer to Question 2

Inconsistent values are different forms of the same data value. For example, in a database of dog owners and their dogs, we might find a border collie listed as b. collie, collie, border, and border collie. This will create query problems. For example, a query for border collie will not return the dogs listed in the other formats. Or, alternatively, we would have to write a query that includes all possible (or at least known) variations of border collie, and that would be a real pain.


ss2343

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Reply 2 on: Jul 7, 2018
Excellent

isabelt_18

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Reply 3 on: Yesterday
:D TYSM

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