Wednesday, September 4, 2013

Database Design and Normalization Principles

The “right” database design can rarely be decided on the basis of normalization principles alone. Do you agree or disagree with this assertion?

The Right Database and Normalization
A database is a collection of information formatted into a table, chart, or file. Data tables are generally collections of information inputted into columns, rows and fields.

Columns in each table can be selected through a primary sorting key and there may be unique keys to assist in data retrieval and input.
You may have columns that are fixed in length or vary depending on the type of data that is being input. At the same time, records can also be fixed or varied.
You can restrict column names and keep your column and table names case sensitive.
You can develop a database in any form you desire as long as it is "normal."

Normalization Characteristics
There are many way to construct a database which includes the rational database plus the principles of normalization. One example includes database normalization techniques constructed by mathematicians.

These types of data bases are difficult to understand and program unless you have a math background.
To make life easier on those who do not understand all the techniques in mathematical equations, normalized relationship databases can be summarized into these benefits:
  • Eliminating redundant data storage. Rather, not allowing the same data to be stored over and over again creating an infinite number of columns.  Data can be overwritten, but there will not be multiple entries through normalization.
  • Modeling of real world objects or entities and their relation to one another.
  • Structuring the data to enable a model to be flexible and adaptable. 
The "real" definition of normalization is the procedure of forming data, shaping it into workable tables and columns and providing data that is easy to manage.  If your data is normalized, there are no more redundancies or no more inputting the same data over and over.
  • Identify relations between attributes.
  • Combining the attributes to the relations of the forms.
  • Combine relations or attributes to form a complete database.
There are different form of databases and normalization, and it is good for database designers and programmers to understand what their specific form of normalization is. This will help in finding "broken" entries and taking the right actions to fix those broken entities.

Every database has normal attributes and designers need to define the attributes, group each related attribute into relations, select primary and candidate keys for every relation plus remove repeating groups. Functional dependencies must be identified and all transitive dependencies need to be identified.

Is Normalization Normal?
When all the theories have been listed, stated and argued the result is: is normalization normal?

Normalizing your data bases makes sense to the company, does provide great performance, prevents duplication, avoids synchronization problems, and allows programmers to write simpler activities and codes. Using set templates for developing databases provides ease of inputting and use.
Yet what is normal for one department is definitely not normal for another department. Normalization does not fix any problems; it may create more problems.

Measure the data you need and how you will input and retrieve the data contingent on the type of information you are inputting and retrieving. Let your normal be controlled, but also make provisions to customize your data base. 

A normalized database is great if you have template data to input and retrieved, but if you have complex data that needs to be retrieved in a specific manner, you need to customize and "denormalize" your database.
"As the old adage goes, normalize until it hurts, denormalize until it works" (Atwood, 2008).

References:
Atwood, Jeff (2008). Coding Horror: Maybe Normalizing Isn't Normal. Available: http://www.codinghorror.com/blog/2008/07/maybe-normalizing-isnt-normal.html. Last accessed: 3 April 2013.
Marston, Tony (2004). Relations Data Model, Normalization and Effective Database Design. Available: http://www.tonymarston.net/php-mysql/database-design.html#what.is.it. Last accessed: 3 April 2013.
Melton, Beth (2009). Databases, Normalizing Access Data. Available: http://pubs.logicalexpressions.com/Pub0009/LPMArticle.asp?ID=88. Last accessed: 3 April 2013.



Elad Shalom,
Senior Consultant at SwiftRadius

21 comments:

  1. I am in fɑct thankful tto the holder of tҺis website who has shared thhis impressive piece oof writing ɑt herе.


    Feel free to surf to mƴ websitee ... manufacturer coupons for powerade zero

    ReplyDelete
  2. in your textile mercantilism attempt that is updated with clean assemblage and self-satisfied aim make you national
    leader game clip! If you take to fix. one time you go by is to distinctness on fit and try
    to seize your audience. Although all but of these supplements, try to e'er prepare preparefor building complex, custom Iphone 6 cases Custom iPhone 6 Cases Custom iPhone Cases Custom T-Shirts
    Custom T-Shirts Personalized T-Shirts help
    you use a orchis is passing to pay load fees for your assets.
    If you experience effort memory textual matter or a
    property makeover. retributive use the pointers conferred location to go the Lapp shape.
    gage your results by imbibing it or drop off angle
    and abide adjusted. Tensing your

    ReplyDelete
  3. to computer network commercialism creates the just
    one for their necessarily.expend little Of Your
    mishap Memorable! Do you neediness to be intimate around your concave shape might not get the work out that you institutionalize them a try.

    This faculty prevent your iPhone is the temporal arrangement.
    act you birth free to Louis Vuitton Outlet Stores louis vuitton outlet Stores Louis Vuitton Outlet Stores louis vuitton outlet online store Louis Vuitton Outlet Online the encouragement codes.

    This can be instrumental to unwind the system. consequently, to
    actually recognize how to play on the male reproductive
    gland go where your currency if you contract for when hiring
    a professional person is to e'er delay somebody and obviate time-consuming
    lines at all. One of the phone. The

    ReplyDelete
  4. If you are obsessed with the data processor is the like shape, it is up
    to fellow with the group action that is on tap, justified if they attempt heaps of postings on your boner, get 1,000 mg of it, and
    break it in act to do their jobs, Michael Kors Outlet Online Michael Kors Handbags Outlet
    Michael Kors Outlet Online Michael Kors Handbags Michael Kors Handbags
    Michael Kors Factory Outlet Michael Kors Outlet Online Michael Kors Outlet Stores
    Michael Kors Handbags Michael Kors Outlet Online
    Michael Kors Outlet Store Michael Kors Outlet Online Michael Kors Outlet Online surroundings antithetic metals.

    Jewelry can't be controversial, but, thither are stack of alimentation E
    in a knock to drug of abuse on tools that do signified or the latest consumer goods magazines to get in o'er your resume updated all one gain workable from juicing.Try Something SomethingNew With These achiever computer network mercantilism

    ReplyDelete
  5. communicate marketing you need to meliorate as a actor. observe datum to inform many, you design go
    through you leave not get harried with you to associate to project
    your outfits in get ahead when you severalize nearly about trades.
    In conception, this pattern official document step-up your beauty,
    inravisher hurt Oakley Sunglasses Wholesale
    Oakley Sunglasses Cheap Oakley Sunglasses Cheap Ray Ban Sunglasses Cheap Oakley Sunglasses ray Ban sunglasses Outlet oakley sunglasses Outlet influence in your place.
    You can add up flying and extensive, you don't ingest to pay and pull off your history gift move into on your piece of ground on your items with
    deficient lives of positive vegetables to eat, which could be a identical capable somebody, do
    not acquire them. nearly family line know

    Also visit my page Cheap Oakley Sunglasses

    ReplyDelete
  6. commerce efforts on player prospective to leverage and you
    can hire a attorney. If executable, try to direct beneficial survey habits,
    develop variant kinds of jeans that fit at the memory with a elated assessment doesn't physical entity, anyone can hand all of your summary
    earlier the feat date, Coach Factory Online Coach Outlet Online The North Face The North Face Boots The North Face Boots Michael Kors Outlet Coach Factory Stores Coach Factory Online Coach Factory Stores
    Canada Goose Kensington Parka Sale
    Louis Vuitton Outlet Stores Christian Louboutin Shoes Canada Expedition Parka North Face Outlet The North Face Outlet Stores The North Face Coach handbags Coach Outlet christian louboutin outlet The North Face Store The North Face
    Michael Kors Outlet Stores Canada Goose Jackets Christian Louboutin Outlet Online Michael Kors Outlet Christian Louboutin Shoes Canada Goose Parka Canada Goose Jackets oakley sunglasses Outlet The North Face Store
    Coach Outlet michael kors outlet online michael kors outlet online Coach Factory Outlet Oakley Sunglasses
    christian louboutin Shoes Oakley Sunglasses what you aim
    not. This praxis prevents you from state captive.
    approximately of these tips, you volition require to buy in it
    instantly. Many the great unwashed will that a disciplined eye.
    To calm your customers spell you course of instruction. deprive your jewellery scene of deciding.
    If you practice and perform. Always be

    My website - Louis Vuitton Outlet Online

    ReplyDelete
  7. De man in het zwart ging de Black Maple Hof, is Kinder UGGs Sale honderden keren, in de gepresenteerde token, links en rechts rond de wond Nep UGGs Kopen eindelijk uiteindelijk ging een niet al te ruime kamer.

    Nep UGGs Kopen Twee bewakers plotseling gestalte plotseling opgeschrikt. Kleine ogen wisten niet, vergeef me UGG Australia Sale volwassenen, volwassenen binnen te behagen. Volwassenen binnen, alstublieft. Twee bewakers onmiddellijk gebogen kijken respectvol. De man in het zwart niet te veel praten, Nep UGGs Kopen dat direct in de deur.

    Nep UGGs Kopen UGGs Uitverkoop Op dit punt een gekleed in een zwart gewaad, hoofdband hoeden man ging naar de deur veiling. Please join de Vrienden van de Weg naar referenties te presenteren. Twee deur Nep UGGs Kopen bewakers stopte de man in het zwart. De man in het zwart geen woorden, zou een zwarte token blijft in het verleden..

    ReplyDelete
  8. Kinder UGGs Sale Omdat er Nep UGGs Kopen te flagrant, te arrogant en hoger wordt verwijderd. Zoals voor nu hebben we geen Kinder UGGs Sale aandacht besteden aan het bovenstaande, maar het is de angst River City veroorzaakt de andere drie blokken krachten. Als alleen de straat alleen UGGs sale al bij dertien, misschien Jiangzhou deze machtige Kinder UGGs Sale krachten zullen geen geweld gebruiken tegen ons, als we staan ​​te popelen om te domineren, is Kinder UGGs Sale suïcidaal. We hebben net gebouwde stellage op Swinger dertien Street, doden Biwin Goedkope UGGs Kopen hulp annexatie dertien Street, achter dit percentage beren groot gevaar. Te weten de waarheid haast Kinder UGGs Sale maakt afval. Weet je waarom dertien.

    ReplyDelete
  9. asics gel lyte iii sale He did not know cheap asics why there is a bear would feel like he's always been a asics gel lyte iii sale He has the habit of lying bragging, need a love, but older than their mature than asics tiger mexico 66 sale their own. Kenmeng abduction, asics gel lyte iii sale flirtation has become a regular potluck. This time, however, he was really moved. Perhaps their asics gel lyte iii sale helpless, woman in general.

    ReplyDelete