Data Models into Database Designs A unique, DBMS-supplied identifier used as the primary key of a relation is called a(n): primary key. surrogate key. foreign key. composite key. primary key. surrogate key. foreign key. composite key. ANSWER DOWNLOAD EXAMIANS APP
Data Models into Database Designs When the parent entity is required, a new child row can always be inserted. True False True False ANSWER DOWNLOAD EXAMIANS APP
Data Models into Database Designs Which constraint requires that the binary relationship indicate all combinations that must appear in the ternary relationship? None of these MUST NOT MUST COVER Both of the above None of these MUST NOT MUST COVER Both of the above ANSWER DOWNLOAD EXAMIANS APP
Data Models into Database Designs A primary key should be defined as: Either of the above can be used. NULL. NOT NULL. None of these Either of the above can be used. NULL. NOT NULL. None of these ANSWER DOWNLOAD EXAMIANS APP
Data Models into Database Designs Which of the following column properties would be used to specify that cells in a column must contain a monetary value that is less than another monetary value in the same row? Null status Data constraints Data type Default value Null status Data constraints Data type Default value ANSWER DOWNLOAD EXAMIANS APP
Data Models into Database Designs When the child entity is required, we are restricted from creating a new parent row without also creating a corresponding child row at the same time. False True False True ANSWER DOWNLOAD EXAMIANS APP