Introduction to Database System Keys made up of two or more attributes are called composite keys. False True False True ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Updating a database means modifying or adding record occurrences all of the listed here reorganizing the database revising the file structure modifying or adding record occurrences all of the listed here reorganizing the database revising the file structure ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Which command(s) is(are) used to enable/disable/drop an integrity constraint in SQL? ALTER TABLE DEFINE TABLE All of the listed here MODIFY TABLE ALTER TABLE DEFINE TABLE All of the listed here MODIFY TABLE ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Every time attribute A appears, it is matched with the same value of attribute B, but not the same value of attribute C. Therefore, it is true that: A → (B,C). A → A → (B,C) → A → (B,C). A → A → (B,C) → ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System The index consists of both (a) and (b) pointers to the master list None of these All of these a list of keys both (a) and (b) pointers to the master list None of these All of these a list of keys ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Which type of entity cannot exist in the database unless another type of entity also exists in the database, but does not require that the identifier of that other entity be included as part of its own identifier? ID- independent entity Strong entity ID-dependent entity Weak entity ID- independent entity Strong entity ID-dependent entity Weak entity ANSWER DOWNLOAD EXAMIANS APP
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