Introduction to Database System Data item characteristics that are important in data management include language punctuation width spelling language punctuation width spelling ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System The relational database model was created by E.F. Codd. True False True False ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System The physical location of a record is determined by a mathematical formula that transforms a file key into a record location in None of these a hashed file a sequential file a tree file an indexed file None of these a hashed file a sequential file a tree file an indexed file ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A scheme describes data elements None of these records and files record relationships All of these data elements None of these records and files record relationships All of these ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System In SQL, which command is used to select only one copy of each set of duplicable rows SELECT DISTINCT All of these SELECT UNIQUE None of these SELECT DIFFERENT SELECT DISTINCT All of these SELECT UNIQUE None of these SELECT DIFFERENT ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System If attribute A determines both attributes B and C, then it is also true that: (B,C) → A → C → B → (B,C) → A → C → B → ANSWER DOWNLOAD EXAMIANS APP
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