Homework: Library Management System- Conceptual Diagram
You need to develop an Entity Relationship Diagram (ERD) for the database for Library Management System. This homework consists of three steps that should be completed.
i. Identify entities;
ii. find relationships; and
iii. Draw the ERD blueprint.
Step I: Identify Entities
Identify the entities. These are typically the nouns and noun-phrases in the descriptive data produced in your analysis. Do not include entities that are irrelevant to your domain.
For example, in a college database project, the entity candidates are departments, chair, professor, course, and course section. Since there is only one instance of the university, we exclude it from our consideration for now.
Step II: Find Relationships
Discover the semantic relationships between entities. In English, the verbs connect the nouns. Not all relationships are this blatant; you may have to discover some on your own. The easiest way to see all the possible relationships is to build a table with the entities across the columns, and down the rows. Then, fill in cells to indicate where relationships exist between the entities.
Step III: Draw the ERD Blueprint
Draw the entities and relationships you have discovered.
To create your ERD, the domain (or subset of a domain) that you chose for your project should include the following characteristics:
i. Size. An appropriately sized domain results in a database with about a dozen entries (more or less).
ii. Relationship. The entities comprising your domain should be interrelated.
iii. Functionality. The scope of the diagram shows the operations or functions that the database project addresses. It also identifies the functions that fall outside of the application.
iv. Description. Define the data requirement of your entities. For example:
v. Student Entity: Members of the public who register and pay for courses are considered students. The data stored on each student includes student number, name, address, email address, previous classes, and experience. Also stored is the date for registration and the classes they are registered in. The student number is unique for each student.
Format your homework according to the following formatting requirements:
i) The answer should be typed, using Times New Roman font (size 12), double spaced, with one-inch margins on all sides.
ii) The response also includes a cover page containing the title of the homework, the student's name, the course title, and the date. The cover page is not included in the required page length.
iii) Also include a reference page. The Citations and references must follow APA format. The reference page is not included in the required page length.