Essay on Database design process - 906 Words

Abstract Database Systems has a practical, hands-on approach that makes it uniquely suited to providing a strong foundation in good database design practice. Database design is more art than science. While its true that a properly designed database should follow the normal forms and the relational model, you still have to come up with a design that reflects the business you are trying to model. This paper shows describes design process of database project. The importance of Completing the Design Process An important point to keep in mind is that the level of structural integrity and data integrity is in direct proportion to how thoroughly the design process is followed. The less time spent on the design process, the greater the risk of†¦show more content†¦Before starting any application design process, sit down and talk it out. If you cant describe your application ¡Ã‚ ªincluding the objectives, audience, and target market ¡Ã‚ ªthen youre not ready to build it, let alone model the database. Once you can describe the actions and nuances of your application to other people and have it make sense to them, you can start thinking about the tables you want to create. Start with big flat tables because, once you write them down, your newfound normalization skills will take over. You will be able to find your redundancies and visualize your relationships. The next step is to do the normalization. Go from flat table, to first normal form, and so on, up to the third normal form if possible. Use paper, pencils, Post-it Notes, or whatever helps you to visualize the tables and relationships. Theres no shame in data modeling on Post-it Notes until youre ready to create the tables themselves. Plus, theyre a lot cheaper than buying software to do it for you, which range from one hundred to several thousands of dollars! After you have a preliminary data model, look at it from the applications point of view. Or look at it from the point of view of the person using the application youre building. This is the point where you define business rules and see if your data model will break. An example of a business rule for an online registration application is, quot;Each user mustShow MoreRelatedquestion answer1663 Words   |  7 Pagesexample Chapter 16 - Review Questions 16.1 Describe the purpose of a design methodology. A design methodology is a structured approach that uses procedures, techniques, tools, and documentation aids to support and facilitate the process of design. 16.2 Describe the main phases involved database design. Database design is made up of three main phases: logical and physical database design. 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