Introduction to Database System The primary key is selected from the: foreign keys. composite keys. candidate keys. determinants. foreign keys. composite keys. candidate keys. determinants. ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A database management system Both of the listed here allows simultaneous access to multiple files None of the listed here can do more than a record management system Both of the listed here allows simultaneous access to multiple files None of the listed here can do more than a record management system ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System If attributes A and B determine attribute C, then it is also true that: (A,B) is a composite determinant. C is a determinant. A → B → (A,B) is a composite determinant. C is a determinant. A → B → ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System The activity of a file refers to how closely the files fits into the allocated is a low percentages of number of records added or deleted from a file is a measure of the percentage of existing records updated during a run if high, reduces processing efficiency for sequential and nonsequential files None of these refers to how closely the files fits into the allocated is a low percentages of number of records added or deleted from a file is a measure of the percentage of existing records updated during a run if high, reduces processing efficiency for sequential and nonsequential files None of these ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System In SQL, which command is used to changes data in a table? INSERT UPDATE BROWSE APPEND INSERT UPDATE BROWSE APPEND ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Which command is used to select distinct subject (SUB) from the table (BOOK)? SELECT DISTINCT SUB FROM BOOK None of these SELECT ALL FROM BOOK SELECT SUB FROM BOOK All of these SELECT DISTINCT SUB FROM BOOK None of these SELECT ALL FROM BOOK SELECT SUB FROM BOOK All of these ANSWER DOWNLOAD EXAMIANS APP
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