Entity-relationship Diagram Exercises And Answers Pdf -

\vspace2cm \noindent\rule\textwidth0.5pt \textbfAnswer: \beginfigure[H] \centering \begintikzpicture \node[rectangle, draw] (order) ORDER \\ \tiny order\_number (PK) \\ order\_date \\ customer\_name; \node[rectangle, draw, double, below=1.5cm of order] (item) LINE ITEM \\ \tiny (weak entity); \node[diamond, draw, aspect=2, left=0.5cm of $(order.south)!0.5!(item.north)$] (contains) CONTAINS; \draw (order) -- (contains); \draw (contains) -- (item); \node[below=0.2cm of item, align=center] \tiny partial key: item\_number \\ attributes: product\_name, quantity, price; \endtikzpicture \captionWeak Entity LINE ITEM identified by ORDER \endfigure

% Works-in (1 to many) \draw (dept) -- node[right] 1 ++(2,0) -- node[above] works-in ++(0,-1.5) -- node[left] M (emp); % Manages (1 to 1, but optional on employee side because not every employee is a manager) \draw[->, thick] (emp.east) -- ++(1.5,0) -- ++(0,1.5) -- node[above, midway] manages (1) (dept.east); \node at (3.5,-0.2) 1 (optional); entity-relationship diagram exercises and answers pdf

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% Lines \draw (student) -- (enroll) node[midway, left] M; \draw (course) -- (enroll) node[midway, right] M; \vspace2cm \noindent\rule\textwidth0