Oracle 12c: SQL
Oracle 12c: SQL
3rd Edition
ISBN: 9781305251038
Author: Joan Casteel
Publisher: Cengage Learning
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Chapter 1, Problem 14MC

A unique identifier for a data row that consists of more than one field is commonly called a:

  1. a. primary plus key
  2. b. composite primary key
  3. c. foreign key
  4. d. none of the above
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Relation: Relation is a two-dimensional table in which data is named. The relations have the named columns and numbers which denote the unnamed rows. Although relation is defined as the two-dimensional table of data, not all the tables are considered as relations. There are some properties that differentiate relation tables from non-relation tables.
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