Question

Scrooge McNugget wants to store information (names, addresses, descriptions of embarrassing moments, etc.) about the many ducks on his payroll. Not surprisingly, the volume of data compels him to buy a database system. To save money, he wants to buy one with the fewest possible features, and he plans to run it as a stand-alone application on his PC clone. Of course, Scrooge does not plan to share his list with anyone. Indicate which of the following DBMS features Scrooge should pay for; in each case, also indicate why Scrooge should (or should not) pay for that feature in the system he buys.
1. A security facility.
2. Concurrency control.
3. Crash recovery.
4. A view mechanism
5. A query language

Answer 1

Scrooge must pay to make his system more effective and reliable for certain of the features listed. Let each of the features be taken into account.

A safety facility:

• This is a crucial factor.
• I strongly suggest that Mr. Scrooge pay and get a safe package.
• This keeps the data private and also prevents data from being lost or curred.

Concurrency control:

• For this application, I need not recommend that the contest control function be added.
• Not many processes happen at the same time.
• This function is required if several operations are in the queue.

Crash recovery:

• You better have a recovery function for a crash.
• Crash can occur on many grounds, such as a network failure, device failure, power failure etc.
• Crash system backups the document and wants to keep it all as before.

A view mechanism:

• I believe there are plenty of free software for observing the dataset, no payment is needed.
• Free software provides ample features.

A query language:

• I recommend not to receive a paid query language.
• For easy processing of databases, there are free query languages like MySQL.

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