Oracle 12c: SQL
3rd Edition
ISBN: 9781305251038
Author: Joan Casteel
Publisher: Cengage Learning
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Chapter 2, Problem 1RQ
Explanation of Solution
Data dictionary:
Data dictionary is referred as the components of
- It offers the DBMS with features of self-describing.
- It resembles x-ray of company’s complete data set and it is vital component in data administration.
- There are two main types of data dictionaries. They are as follows:
- Integrated data dictionary
- Standalone data dictionary
- The functions of data dictionary in the database design are listed below:
- The contents of data dictionary are used for verifying the components of database design such as entities, attributes and relationships that exists between them.
- Database design is used by the designer to check for their homonyms and synonyms.
- It also verifies the entities and attributes created can be able to support all the queries in required way along with report requirements.
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Chapter 2 Solutions
Oracle 12c: SQL
Ch. 2 - Prob. 1RQCh. 2 - What are the two required clauses for a SELECT...Ch. 2 - What is the purpose of the SELECT statement?
Ch. 2 - What does an asterisk () in the SELECT clause of a...Ch. 2 - What is the purpose of a column alias?Ch. 2 - How do you indicate that a column alias should be...Ch. 2 - When is it appropriate to use a column alias?
Ch. 2 - What are the guidelines to keep in mind when using...Ch. 2 - Prob. 9RQCh. 2 - What is a NULL value?
Ch. 2 - Which of the following SELECT statements displays...Ch. 2 - Which clause is required in a SELECT...Ch. 2 - Which of the following is not a valid SELECT...Ch. 2 - Which of the following symbols represents...Ch. 2 - Prob. 5MCCh. 2 - Prob. 6MCCh. 2 - Which of the following is a valid SELECT...Ch. 2 - Which of the following symbols is used in a SELECT...Ch. 2 - Prob. 9MCCh. 2 - When must a comma be used in the SELECT clause of...Ch. 2 - Prob. 11MCCh. 2 - Which clause is not required in a SELECT...Ch. 2 - Which of the following lines of the SELECT...Ch. 2 - Which of the following lines of the SELECT...Ch. 2 - Which of the following lines of the SELECT...Ch. 2 - Which of the following lines of the SELECT...Ch. 2 - Which of the following lines of the SELECT...Ch. 2 - Which of the following lines of the SELECT...Ch. 2 - Which of the following lines of the SELECT...Ch. 2 - Which of the following lines of the SELECT...Ch. 2 - Prob. 1HOACh. 2 - Prob. 2HOACh. 2 - Prob. 3HOACh. 2 - Prob. 4HOACh. 2 - Prob. 5HOACh. 2 - Prob. 6HOACh. 2 - Prob. 7HOACh. 2 - Create a list of each book title stored in the...Ch. 2 - Prob. 9HOACh. 2 - List all information for each order item. Include...
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- Define what a dictionary data structure is and explain its primary purpose in programming.arrow_forwardHow would you describe the contents of a data dictionary?arrow_forwardWhat data structure does a dictionary primarily resemble, and why is it a versatile data structure in programming?arrow_forward
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