Returns the truncated amount by removing any decimal part of that amount beyond the number of digits specified.
TRUNC(Amount, Digits)
Amount: number to be truncated.
Digits: number of digits to which amount should be truncated.
If the digits value is negative, truncating is done to the left of the decimal point.
TRUNC(5.455, 1) equals 5.4
TRUNC(150,-2) equals 100
TRUNC(-5.4,0) equals -5