Introduction to Database System A primary key is a composite key that was selected to be the main identifier for the relation. False True False True 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 Supertype entity Archetype entity Subtype entity Instance entity Supertype entity Archetype entity Subtype entity ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Which of the following is not considered to be a basic element of an enterprise-class database system? Users DBMS Database applications COBOL programs Users DBMS Database applications COBOL programs ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System In SQL, which command is used to remove a stored function from the database? REMOVE FUNCTION None of these DROP FUNCTION DELETE FUNCTION ERASE FUNCTION REMOVE FUNCTION None of these DROP FUNCTION DELETE FUNCTION ERASE FUNCTION ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System The primary key is selected from the: candidate keys. determinants. foreign keys. composite keys. candidate keys. determinants. foreign keys. composite keys. ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Queries to a database can use aggregate functions like SUM and COUNT are written in English None of these All of these both (a) and (b) can use aggregate functions like SUM and COUNT are written in English None of these All of these both (a) and (b) ANSWER DOWNLOAD EXAMIANS APP
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