Chapter 11: Review
Question: 1. Exuninterrupted the deep differences among a rasp regularitying arrangement and a factsbase arrangement ANS: Some deep differences among a factsbase skillful-treatment arrangement and a rasp regularitying arrangement are:
Twain arrangements embrace a assemblage of facts and a determined of programs which admittance that facts. A DBMS coordinates twain the corporeal and the argumentative admittance to the facts, inasmuch-as a rasp-processing arrangement coordinates barely the corporeal admittance. A DBMS reduces the aggregate of facts duplication by ensuring that a corporeal element of facts is adapted to whole programs signed to possess admittance to it, inasmuch-as facts written by single program in a rasp-processing arrangement may referable be readable by another program.
A DBMS is planned to wholeow indulgent admittance to facts (i. e. , queries), inasmuch-as a rasp-processing arrangement is planned to wholeow pre-determined admittance to facts (i. e. , compiled programs).
A DBMS is planned to coordinate multiple truthrs admittanceing the selfselfidentical facts at the selfselfidentical opportunity.
A rasp-processing arrangement is usually planned to wholeow single or past programs to admittance irrelative facts rasps at the selfselfidentical opportunity. In a rasp-processing arrangement, a rasp can be admittanceed by couple programs consentaneously barely if twain programs possess read-barely admittance to the rasp.
2. Suggest three natural interest situations where referential parity avoids facts problems. ANS:
In an list command arrangement, you don’t shortness an command to be deleted if there are list command items, or those items conciliate be orphaned. If you are assigning customers to a salesperson, referential parity would effect enduring that a customer wasn’t assigned to a salesperson that doesn’t remain.
Payments in an statementing arrangement should barely be applied to an statement, and if that statement compute changes, you shortness entries on that statement to be updated as well-mannered.
Project: 1. Inquiry the Internet to ascertain instruction encircling facts storage controlmats. Also do the exploration on interdiplomatic conclusion controlmats.
Determine whether the conclusion controlmats truthd in the United States is the most vile controlmat. ANS: According to my exploration on the Programmers website, I consider that we possess frequent irrelative ways to treasure a program facts: uninterrupted passage which the impression has smwhole bulk of merely structured facts, and facts are referable qualified consentaneously by multiple truthrs. XML is smwhole bulk of structured facts that are referable qualified consentaneously or frequently. Factsbase which is big structured facts or compatible admittance is needed.
Need control querying and inquiry is a must in the impression. Binary facts truth control streaming objects. Zipping is compression that may be adventitious as another regularity control any of the aloft negative factsbases on servers. The interdiplomatic controlmat defined by ISO (ISO 8601) tries to oration whole these problems by defining a numerical conclusion arrangement as follows: YYYY-MM-DD where * YYYY is the year [whole the digits, i. e. 2012] * MM is the month [01 (January) to 12 (December)] * DD is the day [01 to 31]
Control model, “3rd of April 2002”, in this interdiplomatic controlmat is written: 2002-04-03 In the United States, conclusions are transmittedly written in the “month day, year” command. This is the most vile controlmat becatruth it truthd in twain transmitted numeric conclusion. This conclusion controlmat was commbarely truthd near the smwhole endian controlm in the United Kingdom until the present 20th Century and can be rest in twain obsolete and late stereotype resources such as the London Gazette and The Opportunitys, respectively.
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