When considering creating a join between two tables, how are we demonstrating the concept of "relational" databases? Why is it essential that we create the join by finding a common attribute that is unique in at least one table and look at situations where that attribute has the same value ( is equal ) in both tables?
When considering creating a join between two tables, how are we demonstrating the concept of "relational" databases? Why is it essential that we create the join by finding a common attribute that is unique in at least one table and look at situations where that attribute has the same value ( is equal ) in both tables?
Database Systems: Design, Implementation, & Management
12th Edition
ISBN:9781305627482
Author:Carlos Coronel, Steven Morris
Publisher:Carlos Coronel, Steven Morris
Chapter3: The Relational Database Model
Section: Chapter Questions
Problem 16RQ: Create the table that results from applying an INTERSECT relational operator to the tables shown in...
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When considering creating a join between two tables, how are we demonstrating the concept of "relational"
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Introduction
Relational database : A relational database organizes data into rows and columns, which collectively form a table. Data is typically structured across multiple tables, which can be joined together via a primary key or a foreign key.
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