Oracle 12c: SQL
3rd Edition
ISBN: 9781305251038
Author: Joan Casteel
Publisher: Cengage Learning
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Chapter 1, Problem 6HOA
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Entity Relationship model
- An entity-relationship model describes interrelated things of interest in a specific domain of knowledge.
- It is composed of entity types and specifie...
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The many-to-many relationship between entities is not supported by which data model? Please explain the model's advantages and disadvantages.
Develop a simple data model for a student database that includes student data, student contact data, student demographic data, student grades data, and student financial data. Determine the data attributes that should be present in each table, and identify the primary key for each table. Develop a complete entity relationship diagram that shows how these tables are related to one another.
Make a difference between the three data modelling tiers.
Chapter 1 Solutions
Oracle 12c: SQL
Ch. 1 - Prob. 1RQCh. 1 - Prob. 2RQCh. 1 - Prob. 3RQCh. 1 - Prob. 4RQCh. 1 - Discuss the problems that can be caused by data...Ch. 1 - Explain the role of a primary key.Ch. 1 - Prob. 7RQCh. 1 - Prob. 8RQCh. 1 - What type of relationship can’t be stored in a...Ch. 1 - Identify at least three reasons an organization...
Ch. 1 - Prob. 1MCCh. 1 - Prob. 2MCCh. 1 - Prob. 3MCCh. 1 - Prob. 4MCCh. 1 - Prob. 5MCCh. 1 - Prob. 6MCCh. 1 - Prob. 7MCCh. 1 - Which of the following has no partial or...Ch. 1 - Prob. 9MCCh. 1 - Which of the following has no partial dependencies...Ch. 1 - Which of the following has no repeating groups but...Ch. 1 - Prob. 12MCCh. 1 - Prob. 13MCCh. 1 - A unique identifier for a data row that consists...Ch. 1 - Which of the following symbols represents an...Ch. 1 - Prob. 16MCCh. 1 - Which of the following represents a field in a...Ch. 1 - Which of the following defines a relationship in...Ch. 1 - When part of the data in a table depends on a...Ch. 1 - Which of the following is used to join data...Ch. 1 - Which tables and fields would you access to...Ch. 1 - Prob. 2HOACh. 1 - Prob. 3HOACh. 1 - Prob. 4HOACh. 1 - Access path A database table is composed of...Ch. 1 - Prob. 6HOACh. 1 - Prob. 7HOACh. 1 - Prob. 8HOACh. 1 - Prob. 9HOACh. 1 - Prob. 10HOA
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- The ______________ model is a simple but highly useful way to organize data into collections of two-dimensional tables called relations.arrow_forwardDevelop a simple data model for a student database that includes student contact data, student demographic data, student grades data, and student financial data. Determine the data attributes that should be present in each table, and identify the primary key for each table. Develop a complete ER diagram that shows how these tables are related to on another.arrow_forwardWhat are the challenges and advantages of using composite attributes in data modeling?arrow_forward
- Part 2: Relational data model. Take a subset of the ideas from the conceptual model you constructed in Part 1 and design a simple relationship model similar to the ones we discussed in Module 2, Video 4 Your model should have at least 5 tables You should include at least 20 attributes, or fields, in your model (20 total across all tables, not per table) Your model should be normalized Identify the primary key in each table, and state whether it is a natural or surrogate key For each relationship between tables, identify any foreign keys needed to define the relationship For each table, identify what type of system or systems you think the data might come from, like those we discussed in Module 1, Video 6.arrow_forwardWhat is the purpose of cardinality and participation constraints in data modeling, and how do they affect relationships between entities?arrow_forwardHow can "check constraints" be effectively utilized in data modeling to ensure data quality?arrow_forward
- What is the role of cardinality and optionality in defining relationships between entities in a data model?arrow_forwardGiven the information package below, create the dimensional model having a star schema data design. Include the Primary keys (PK) and the Foreign Keys(FK) as needed.arrow_forwardThe crow's foot in a diagram a.) is only used to show N:M relationships. b.) shows the relationship between three entities. c.) indicates that more than one of that entity type can be involved in that relationship. d.) shows the minimum number of entities that can be involved in a relationship. When translating an ER model into database tables a.) each relationship is defined by a normal form. b.) each entity is represented with a table. D.) each relationship is represented with a table.arrow_forward
- Why is it important to differentiate between derived and stored attributes in data modeling?arrow_forward"In the context of data modeling, what are aggregate attributes and how are they used?"arrow_forwardWhich of the following data models does not contain the many-to-many relationship between entities? What are the benefits and drawbacks of employing this model?arrow_forward
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