week 5 Assignment – Database Modeling and Normalization
Overview
Imagine that you work for a consulting firm that offers information technology and database services. Part of its core services is to optimize and offer streamlined solutions for efficiency. In this scenario, your firm has been awarded a contract to implement a new personnel system for a government agency. This government agency has requested an optimized data repository for its system, which will enable the management staff to perform essential human resources (HR) duties along with the capability to produce ad hoc reporting features for various departments. They look forward to holding data that will allow them to perform HR core functions such as hiring, promotions, policy enforcement, benefits management, and training.
Instructions
Using this scenario, write a 3–4 page paper in which you:
- Determine the steps in the development of an effective entity relationship model (ERM) diagram and determine the possible iterative steps and factors that one must consider in this process, with consideration of the HR core functions and responsibilities of the client.
- Analyze the risks that can occur if any of the developmental or iterative steps of creating an ERM diagram are not performed.
- Select and rank at least five entities that would be required for the development of the data repositories.
- Specify the components that would be required to hold time-variant data for policy enforcement and training management.
- Diagram a possible 1:M solution that will hold salary history data, job history, and training history for each employee through the use of graphical tools. Note: The graphically depicted solution is not included in the required page length.
- Plan each step of the normalization process to ensure the 3NF level of normalization using the selected five entities of the personnel database solution. Document each step of the process and justify your assumptions in the process.
- Diagram at least five possible entities that will be required to sustain a personnel solution. (Note: The graphically depicted solution is not included in the required page length.) The diagram should include the following:
- Dependency diagrams.
- Multivalued dependencies.
- The cover page and the reference page are not included in the required assignment page length. Include charts or diagrams created in any chart or drawing tool with which you are familiar. The completed diagrams or charts must be imported into the Word document before the paper is submitted.
This course requires the use of Strayer Writing Standards. For assistance and information, please refer to the Strayer Writing Standards link in the left-hand menu of your course. Check with your professor for any additional instructions.
The specific course learning outcome associated with this assignment is:
- Create a database using normalization techniques and logical/physical design best practices.
Introduction
You’ve got a ton of data to store, and you want it to be easy to search and analyze. You need a database that can handle your growing volume of records, but you don’t want it to become an unmanageable mess. In this article, we’ll introduce some basics about database modeling and normalization so that when the time comes for you to build your own database system (or redesign an existing one), you’ll know exactly what steps are involved in creating something both stable and scalable—and how those steps work together.
Database Modeling
Database modeling is the process of defining the set of tables, their attributes and relationships between them.
It’s a good idea to start by thinking about how you want your database to look before you even start building it. This will help you make sure that your design is consistent with what you want, as well as give you an idea of how much data should be stored in each table.
Once this has been done, it’s time for actual coding!
Database Normalization
The first step to solving any problem is to define it. When you’re looking for a solution, make sure you know what your goal is and why it matters. If your goal is lose weight, then don’t worry about which exercise program or diet plan will help most—just pick one! Once you’ve set a goal, keep in mind that there are no shortcuts to success; success will come only with hard work and persistence.
Once you’ve defined your problem as best as possible (and hopefully narrowed down some options), then it’s time for action: choose a solution from all the options available and get started! Don’t worry about other people’s goals—they may not have yours in mind when they’re trying out new routines or diets; after all, everyone has different preferences when it comes down to fitness goals so do what works best for yourself! Be ambitious but realistic about what can be achieved within 3-6 months of consistent effort–that way if something doesn’t work out quite right at first tryout then maybe next time around things won’t feel quite so difficult after all 🙂
Learn the basics of database modeling and normalization.
Learn the basics of database modeling and normalization.
Normalization is the process of organizing data into tables, fields and relationships; it helps avoid data redundancy, which can cause problems in database management systems (DBMS). A well-designed database model will have a single source of truth for all your information stored in one place. This ensures that you don’t have to manually track changes to multiple places throughout your organization if someone makes a mistake or forgets something important!
Conclusion
Hopefully, this article has helped you understand the basics of database modeling and normalization. We covered what they are, how they work, and why they’re important to consider when designing your application’s database. If you want to learn more about databases and databases modeling, check out our other articles on SQL queries or relational databases!