Introduction to Database System An entity class is a collection of entities and is described by the structure of the entities in that class. True False True False ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Entities use identifiers while tables use keys. False True False True ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A key: can only be one column. must always be composed of two or more columns. identifies a column. identifies a row. can only be one column. must always be composed of two or more columns. identifies a column. identifies a row. ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System In which of the following is a single-entity instance of one type of related to a single-entity instance of another type? Composite Relationship Many-to-Many Relationship One-to-One Relationship One-to-Many Relationship Composite Relationship Many-to-Many Relationship One-to-One Relationship One-to-Many Relationship ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Which of the following refers to an entity in which the identifier of one entity includes the identifier of another entity? ID-dependent entity Strong entity ID-independent entity Weak entity ID-dependent entity Strong entity ID-independent entity Weak entity ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System In SQL, which command is used to add a column/integrity constraint to a table INSERT COLUMN MODIFY TABLE ALTER TABLE ADD COLUMN INSERT COLUMN MODIFY TABLE ALTER TABLE ADD COLUMN ANSWER DOWNLOAD EXAMIANS APP
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