Cis 109 Assignment 3

In: Computers and Technology

Submitted By max150
Words 1091
Pages 5
Logical Design
Gregory M Dowell
CIS 111
Professor Thakkar
25 February 2014

Logical Design The purpose of normalization is to create a stable set of relations is representative of the operations of an enterprise. By doing this we are able to reduce redundancy to save space and avoid inconsistencies in data. It also ensures that the design is free of certain updates, insertions, and deletion anomalies (Ricardo, 2012). With normalization as with most anything else there are advantages and disadvantages. The advantages of normalization are: ACID, which stands for atomicity, consistency, isolation, and durability. Atomicity means the transaction is a single unit. Either the entire set of actions is carried out or is not. Consistency means that the user ensures their transactions will leave the database in a consistent state. Isolation is the requirement that the final effect of the transaction appear as if it were executed one after another instead of concurrently. Durability is ensuring that the effects are permanently recorded in a database even if the system crashes before all its rights are made to the database (Ricardo, 2012). Another advantage of normalization is performance. Well-normalized databases are faster to write to and access. Disadvantages of normalization are: they are difficult and expensive to do, require great skill and experience to create correctly, require discipline to maintain, and requires skill and discipline to keep well indexed (Vera Huneeus, 2014). Utilizing someone who is experienced and skilled at normalization, a database can run with more speed and efficiency and less redundancy or free of certain updates, insertions, and deletion anomalies. The main reason for normalization is to eliminate the problems that are caused by redundancy. These problems consist of redundant storage, update anomalies, insertion…...

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