Introduction to Database System A key is a group of one or more attributes that uniquely identifies a row. True False True False ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System In a one-to-many relationship, the entity that is on the many side of the relationship is called a(n) ________ entity. parent subtype child instance parent subtype child instance ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Given the functional dependency R → (S,T) , then it is also true that R → S. False True False True ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A subtype entity is a special case of another entity called a supertype entity. True False True False ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A network schema permits many-to-many relation¬ships All of the listed here restricts the structure to a one-to-many relationship stores data in tables permits many-to-many relation¬ships All of the listed here restricts the structure to a one-to-many relationship stores data in tables ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Which of the following is not characteristic of a relational database model? tables treelike structure records complex logical relationships tables treelike structure records complex logical relationships ANSWER DOWNLOAD EXAMIANS APP
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