Database Concepts (8th Edition)
Database Concepts (8th Edition)
8th Edition
ISBN: 9780134601533
Author: David M. Kroenke, David J. Auer, Scott L. Vandenberg, Robert C. Yoder
Publisher: PEARSON
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Chapter 5, Problem 5.27RQ

Explanation of Solution

One-to-many relationship (1:N):

One-to-many relationship is one of the types of binary relationship that refer to the relationship between two entities which means one parent field or record can be associated with one or more child field or record.

ID-dependent entity:

In the entity-relationship model, an identifier of one entity is dependent on the identifier of another entity and it is special kind of weak entity.

  • In entity-relationship model, id-dependent entity is represented as rounded corners.
  • Note: Identifier is an attribute which is used to uniquely identify a particular entity instances from an entity.

Example:

In a class database, a teacher can teach many subjects, but the subject would not have same kind of relationship with the teacher.

IE Crow’s feet ER diagram:

Information Engineering is a method to represent the relationship between entities...

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Dijkstra's Algorithm (part 1).  Consider the network shown below, and Dijkstra’s link-state algorithm. Here, we are interested in computing the least cost path from node E (note: the start node here is E) to all other nodes using Dijkstra's algorithm. Using the algorithm statement used in the textbook and its visual representation, complete the "Step 0" row in the table below showing the link state algorithm’s execution by matching the table entries (i), (ii), (iii), and (iv) with their values.  Write down your final [correct] answer, as you‘ll need it for the next question.
4. |z + 5 - 5i| = 7
14. dz, C: |z❘ C: |z❘ = 0.6 ze² - 2iz H
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Enhanced Entity Relationship Model; Author: Data Science Center;https://www.youtube.com/watch?v=ocQUtXPumdQ;License: Standard YouTube License, CC-BY