Multiple choice technology databases The output of the query "select sign(abs(-88)) from dual;" is - + 0 1 None of the above Reveal answer Fill a bubble to check yourself D Correct answer Explanation The abs function returns absolute value, so abs(-88) = 88. The sign function returns 1 for positive numbers, -1 for negative, and 0 for zero. Therefore sign(abs(-88)) = sign(88) = 1.