Introduction to Database System
Sophisticated report generators can

print row-oriented reports
All of the listed here
perform arithmetic operations
selectively retrieve and print portions of a list

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Introduction to Database System
The activity of a file

refers to how closely the files fits into the allocated
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
is a low percentages of number of records added or deleted from a file

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