Data Models into Database Designs Which constraint requires that the binary relationship indicate all combinations that must appear in the ternary relationship? MUST COVER MUST NOT None of these Both of the above MUST COVER MUST NOT None of these Both of the above 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): surrogate key. foreign key. primary key. composite key. surrogate key. foreign key. primary key. composite key. 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? Default value Null status Data constraints Data type Default value Null status Data constraints Data type ANSWER DOWNLOAD EXAMIANS APP
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 Which of the following column properties would be used to specify that cells in a column must be immediately filled with a monetary value of $10,000? Null status Data type Data constraints Default value Null status Data type Data constraints Default value ANSWER DOWNLOAD EXAMIANS APP
Data Models into Database Designs An ideal primary key is short, numeric and seldom changing. False True False True ANSWER DOWNLOAD EXAMIANS APP
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