Entity-relationship Diagram Exercises And Answers Pdf May 2026

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% Optional: show as associative entity? For clarity, many-to-many with attribute. \endtikzpicture \captionERD for University Enrollment (Many-to-Many with attribute) \endfigure \noindent\textitNote: In physical design, ENROLLS becomes a bridge table containing student\_ID, course\_code, and enrollment\_date. entity-relationship diagram exercises and answers pdf

\draw (dept) -- (manages) node[midway, above] 1; \draw (emp) -- (manages) node[midway, below] 1; \endtikzpicture \captionCompany ERD \endfigure \newpage % Optional: show as associative entity

% Course Entity \node[rectangle, draw, minimum width=2.5cm, minimum height=1cm, right=of student] (course) COURSE; \node[above=0.2cm of course] \textbfCourse; \node[below=0.1cm of course, align=center] \tiny course\_code (PK)\\ title\\ credits; \draw (dept) -- (manages) node[midway, above] 1; \draw

\textbfTask: Draw an ERD with generalization (disjoint, total).

\sectionExercise 1: University Database \textbfScenario: \\ A university needs a database to manage its courses and students. \beginitemize \item Each \textbfStudent has a unique student ID, name, and major. \item Each \textbfCourse has a unique course code, title, and credits. \item A student can enroll in many courses. A course can have many students. \item The enrollment date should be recorded as an attribute of the relationship. \enditemize

\draw (dept) -- (works) node[midway, above] 1; \draw (emp) -- (works) node[midway, below] M;