Oracle 12c: SQL
3rd Edition
ISBN: 9781305251038
Author: Joan Casteel
Publisher: Cengage Learning
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Textbook Question
Chapter 1, Problem 6RQ
Explain the role of a primary key.
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What is the meaning of the primary key?
Candidate Key is a key that
may have many duplicates
may be absent
may be a foreign key
contain only unique values and fully defines all other attributes in a row
True or False: Referential integrity constraints ensure the values of a primary key are valid based on the values in a foreign key.
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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- A unique identifier for a data row that consists of more than one field is commonly called a: primary plus key composite primary key foreign key none of the abovearrow_forwardWhat is a relation?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_forward
- Please what is an independent clausearrow_forwardHow is a foreign key different from a primary key?arrow_forwardhttps://sqliteonline.com/ : Program link The first requirement: Using the SQL language, transform the following entity model into tables in the database. Entity Manger contains: M-name The name of the manager. M-ID and manager number.The department entity contains: D-name The name of the department. D-ID and department number.Create constraint master key name of the manager when creating the Manger table.Creating the foreign key constraint The name of the manager when creating the Department table. The second requirement: After creating the tables and specifying the primary and foreign key, do the following: * Add a column D_loc to the Department table, specifying the type of column.* Remove the column named M_name from the Manger table* Change the name of the department table to Dep Please:: ******* ATTACH A PICTURE OF THE CODES USED AND PICTURE OF THE PROGRAM SCREEN *******arrow_forward
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