A Guide to SQL
9th Edition
ISBN: 9781111527273
Author: Philip J. Pratt
Publisher: Course Technology Ptr
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Chapter 2, Problem 3TD
Program Plan Intro
Shorthand representation of the relational
- The shorthand representation is used to represent the database table in an easier and an understandable way by using primary keys.
- The step wise process for representing a shorthand representation of a database structure is as follows:
- First, the Table Name is written down.
- Using paranthesis, list down all the columns or fields in the table within the paranthesis.
- From the shorthand representation, data such as primary keys can be identified.
- In this kind of representation, bold or underline data is used to represent a Primary key.
Entity Relationship Diagram (ERD):
Entity relationship diagram is basically a picture or snapshot about the business system. It means that the information stored and created is represented by this diagram.
- Entities may represent the physical object, event, or concept.
- An attribute is a property of an entity.
- Relationship denotes the link between the entities.
- If an independent child entity is present in a relationship then it is called a non-identifying relationship.
- If a dependent child entity is present in a relationship then it is called a non-identifying relationship.
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Chapter 2 Solutions
A Guide to SQL
Ch. 2 - Prob. 1RQCh. 2 - What is an attribute?Ch. 2 - What is a relationship? What is a one-to-many...Ch. 2 - Prob. 4RQCh. 2 - What is a relation?Ch. 2 - Prob. 6RQCh. 2 - Prob. 7RQCh. 2 - How do you qualify the name of a field, and when...Ch. 2 - Prob. 9RQCh. 2 - What is a primary key? What is the primary key for...
Ch. 2 - Prob. 11RQCh. 2 - Prob. 12RQCh. 2 - Define second normal form. What types of problems...Ch. 2 - Define third normal form. What types of problems...Ch. 2 - Prob. 15RQCh. 2 - Prob. 16RQCh. 2 - List the changes you would need to make to your...Ch. 2 - Prob. 1TDCh. 2 - Prob. 2TDCh. 2 - Prob. 3TDCh. 2 - Prob. 4TDCh. 2 - Prob. 5TDCh. 2 - Prob. 1CATCh. 2 - Identify the functional dependencies in the...Ch. 2 - Prob. 3CATCh. 2 - Determine the functional dependencies that exist...Ch. 2 - Prob. 2SCGCh. 2 - Prob. 3SCG
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- An EMPLOYEES table was added to the JustLee Books database to track employee information. Display a list of each employee’s name, job title, and manager’s name. Use column aliases to clearly identify employee and manager name values. Include all employees in the list and sort by manager name.arrow_forwardAccess path A database table is composed of records and fields hold data. Data is stored in records. A field is a part of a record and contains a single piece of data for the subject of the record. The access path for finding the list of books is AUTHOR: AuthorID, Lname BOOKAUTHOR: AuthorID, ISBN BOOKS: Pubdate, ISBNarrow_forwardWhat is a primary key? What is the primary key for each of the tables in the Colonial Adventure Tours database shown in Chapter 1?arrow_forward
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