A FedSQL
function performs a computation on FedSQL expressions and returns
either a single value or a set of values if the FedSQL expression
is a column. Functions that perform a computation on a column are
aggregate
functions. In other SQL environments, aggregate functions
are also known as set functions.
FedSQL functions can
be used in FedSQL applications or in DS2 programs where embedded FedSQL
is part of a DS2 application.
Note: For the FedSQL functions
that are like-named in Base SAS, these functions can take DOUBLE and
character arguments and return values, but all character return values
are NVARCHAR.