Introduction to Database System Which command is used to select distinct subject (SUB) from the table (BOOK)? SELECT ALL FROM BOOK SELECT DISTINCT SUB FROM BOOK SELECT SUB FROM BOOK None of these All of these SELECT ALL FROM BOOK SELECT DISTINCT SUB FROM BOOK SELECT SUB FROM BOOK None of these All of these ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Which of the following products was an early implementation of the relational model developed by E.F. Codd of IBM? R:base DB2 dBase-II IDMS R:base DB2 dBase-II IDMS ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Data encryption techniques are particularly useful for protecting data in data communication systems reducing storage space requirements All of these improving data integrity None of these protecting data in data communication systems reducing storage space requirements All of these improving data integrity None of these ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System The relational database model was created by E.F. Codd. False True False True ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A relation is considered a: three-dimensional table. one-dimensional table. two-dimensional table. Column. three-dimensional table. one-dimensional table. two-dimensional table. Column. ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Which of the following is a serious problem of file management systems? program dependence data redundancy difficult to update All of these lack of data independence program dependence data redundancy difficult to update All of these lack of data independence ANSWER DOWNLOAD EXAMIANS APP
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