Introduction to Database System A key is a group of one or more attributes that uniquely identifies a row. False True False True ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A _____ means that one record in a particular record type may be related to more than one record of another record type. Many-to-one relationship One-to-one relationship Many-to many relationship One-to-many relationship Many-to-one relationship One-to-one relationship Many-to many relationship One-to-many relationship ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System An on-line commercial site such as Amazon.com is an example of a(n) ________ . single-user database application multiuser database application e-commerce database application data mining database application single-user database application multiuser database application e-commerce database application data mining database application ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A key: identifies a row. can only be one column. identifies a column. must always be composed of two or more columns. identifies a row. can only be one column. identifies a column. must always be composed of two or more columns. ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Which of the following refers to something that can be identified in the user's work environment, something that the users want to track? Attribute Identifier Relationship Entity Attribute Identifier Relationship Entity ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Which type of entity represents a logical generalization whose actual occurrence is represented by a second, associated entity? Instance entity Archetype entity Supertype entity Subtype entity Instance entity Archetype entity Supertype entity Subtype entity ANSWER DOWNLOAD EXAMIANS APP
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