4 | Information Systems homework help


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Part 1:

 Entity Types and Relationships: Translating Business Requirements into Referential Integrity Actions

Prior to beginning work on this discussion, read Chapters 7 and 8 from the text book, the Create a Database (Links to an external site.) article and the database Constraints (Links to an external site.), and review any relevant information in this week’s lecture

Last week you normalized your ERD and created the tables in your selected Relational Database Management System. For this discussion, you need to turn your attention to the business requirements. A typical business requirement might be that all employees are at least 16 years of age. Regardless of the selected RDBMS, business requirements are ultimately enforced by implementing database constraints on tables and columns. These constraints include:

  • A NOT NULL constraint 
  • A unique constraint 
  • A primary key constraint 
  • A foreign key constraint 
  • A check constraint 

Database designers implement some and/or all of the above database constraints to meet the business requirements established during the analysis phase of the Database Life Cycle.

In your initial post, provide two examples of new business requirements and the database constraints that could be implemented to enforce them. Describe in detail the role of the constraints and provide the SQL statements required to create them in the database. Explain the advantages and disadvantages of implementing database constraints as well as any potential performance issues your database constraints may cause.

Must be a minimum of 300 words

Part 2:


Creating a Database in the Structured Query Language (SQL) Server

Prior to beginning work on this assignment read Chapter 9 of your textbook, review the Microsoft Create a Database (Links to an external site.) website and review any relevant information in this week’s lecture. Review the chapter readings and the website to learn more about the process of creating tables and related attributes.

This assignment will be completed within the Virtual Lab Environment. For this assignment, you will access your virtual Structured Query Language (SQL) server, create a database and translate the normalized ERD from the Week Three assignment into the SQL server entities. Within the SQL server database all the following requirements must be met.

  • Create all entities with appropriate attributes
  • Select appropriate data types for all fields
  • Translate business requirements into integrity constraints
  • Build the ERD using the SQL Server Diagramming tool

Once you have created your SQL server database you will create a document. Take screenshots of the ERD and each of the individual tables within the database and paste these with appropriate labels into the document. You must submit the document via Waypoint for grading. Your instructor will also review your SQL server database within your virtual lab for grading purposes.

The assignment

  • Must be six to eight screenshots in length and formatted according to APA style as outlined in the Writing Center (Links to an external site.).
  • Must include a separate title page with the following:
    • Title of paper
    • Student’s name
    • Course name and number
    • Instructor’s name
    • Date submitted

Carefully review the Grading Rubric (Links to an external site.) for the criteria that will be used to evaluate your assignment. 

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