Introduction to Database System In SQL, which command is used to select only one copy of each set of duplicable rows None of these All of these SELECT DIFFERENT SELECT UNIQUE SELECT DISTINCT None of these All of these SELECT DIFFERENT SELECT UNIQUE SELECT DISTINCT ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System In SQL, which command(s) is(are) used to enable/disable a database trigger? ALTER TRIGGER CHANGE USER All of the listed here MODIFY USER ALTER TRIGGER CHANGE USER All of the listed here MODIFY USER ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A command that lets you change one or more fields in a record is Modify All of these Insert Look-up None of these Modify All of these Insert Look-up None of these ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System Periodically adding, changing and deleting file records is called file upgrading Updating restructuring renewing upgrading Updating restructuring renewing ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System With respect to data input, the most accurate description of batch control is dividing documents to be entered into batches None of these controlling the input of each input clerk All of these comparing to a pre-calculated figure the total of a data item summed across a batch records put into the system dividing documents to be entered into batches None of these controlling the input of each input clerk All of these comparing to a pre-calculated figure the total of a data item summed across a batch records put into the system ANSWER DOWNLOAD EXAMIANS APP
Introduction to Database System A key: identifies a column. can only be one column. must always be composed of two or more columns. identifies a row. identifies a column. can only be one column. must always be composed of two or more columns. identifies a row. ANSWER DOWNLOAD EXAMIANS APP
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