Data Models into Database Designs When the parent entity is required and the parent has a surrogate key, update actions can be ignored. True False True False ANSWER DOWNLOAD EXAMIANS APP
Data Models into Database Designs For every relationship, there are six possible referential integrity actions. True False True False ANSWER DOWNLOAD EXAMIANS APP
Data Models into Database Designs Surrogate keys have much meaning for users. True False True False ANSWER DOWNLOAD EXAMIANS APP
Data Models into Database Designs Which of the following column properties specifies whether or not cells in a column must contain a data value? Data type Null status Default value Data constraints Data type Null status Default value Data constraints ANSWER DOWNLOAD EXAMIANS APP
Data Models into Database Designs A primary key should be defined as: NOT NULL. None of these NULL. Either of the above can be used. NOT NULL. None of these NULL. Either of the above can be used. ANSWER DOWNLOAD EXAMIANS APP
Data Models into Database Designs A unique, DBMS-supplied identifier used as the primary key of a relation is called a(n): foreign key. surrogate key. primary key. composite key. foreign key. surrogate key. primary key. composite key. ANSWER DOWNLOAD EXAMIANS APP
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