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Given the default schema of a database: Orders 123 Orderld OrderDate ADC OrderNumber 123 Customerld 123 TotalAmount Orderltem 123 Itemid 123 Orderld 123 Productld 123 UnitPrice 123 Quantity - Orderltem is Customers 123 Customerld ADC FirstName ADC LastName ADC City ADC Country noc Phone - Customers is Products 123 ProductId noc ProductName 123 Supplierld 123 UnitPrice ADC Package 123 IsDiscontinued Suppliers Choose the correct option to complete the statements. The number of foreign keys in table ◆ 123 Supplierld RDC CompanyName ADC ContactName ADC ContactTitle ADC City noc Country ADC Phone ADC Fax

Given the default schema of a database: Orders 123 Orderld OrderDate ADC OrderNumber 123 Customerld 123 TotalAmount Orderltem 123 Itemid 123 Orderld 123 Productld 123 UnitPrice 123 Quantity - Orderltem is Customers 123 Customerld ADC FirstName ADC LastName ADC City ADC Country noc Phone - Customers is Products 123 ProductId noc ProductName 123 Supplierld 123 UnitPrice ADC Package 123 IsDiscontinued Suppliers Choose the correct option to complete the statements. The number of foreign keys in table ◆ 123 Supplierld RDC CompanyName ADC ContactName ADC ContactTitle ADC City noc Country ADC Phone ADC Fax

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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q10- Options to fill in the blank to choose from are - 0,1,2

Given the default schema of a database: Orders 123 Orderld Order Date ADC OrderNumber 123 Customerld 123 TotalAmount Orderltem 123 Itemld 123 Orderld 123 Productld 123 UnitPrice 123 Quantity - Orderltem is Customers 123 Customerld - Customers is ADC FirstName ADC LastName ADC City noc Country ADC Phone Products 123 Productld noc ProductName 123 Supplierld 123 UnitPrice ADC Package 123 IsDiscontinued Choose the correct option to complete the statements. The number of foreign keys in table ◆ Suppliers ◆ 123 Supplierld RDC CompanyName ADC ContactName ADC ContactTitle AOC City noc Country ADC Phone ADC Fax
Transcribed Image Text:Given the default schema of a database: Orders 123 Orderld Order Date ADC OrderNumber 123 Customerld 123 TotalAmount Orderltem 123 Itemld 123 Orderld 123 Productld 123 UnitPrice 123 Quantity - Orderltem is Customers 123 Customerld - Customers is ADC FirstName ADC LastName ADC City noc Country ADC Phone Products 123 Productld noc ProductName 123 Supplierld 123 UnitPrice ADC Package 123 IsDiscontinued Choose the correct option to complete the statements. The number of foreign keys in table ◆ Suppliers ◆ 123 Supplierld RDC CompanyName ADC ContactName ADC ContactTitle AOC City noc Country ADC Phone ADC Fax
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A Foreign key is a field in a table that is used to reference the Primary key of another table.

It is used to establish a link between the tables and helps to maintain the data consistency.

The table in which this foreign key is used is generally called as child table, while the table from which this foreign key is taken is called as parent table[in which this foreign key is primary key].

 

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