If all arguments have
null or missing values, the result is a null or missing value depending
on whether you are in ANSI mode or SAS mode. For more information, see How FedSQL Processes Nulls and SAS Missing Values.
Otherwise, the result
is the interquartile range of the non-null or nonmissing values. The
formula for the interquartile range is the same as the one that is
used in the Base SAS UNIVARIATE procedure. For more information, see Base
SAS Procedures Guide: Statistical Procedures.
Example
The following statement
illustrates the IQR function: