The software processes
the entire data set unless you specify a range of rows with the STARTOBS=
and ENDOBS= options. If the ENDOBS= option is used without the STARTOBS=
option, the implied value of STARTOBS= is 1. When both options are
used together, the value of STARTOBS= must be less than the value
of ENDOBS=.
In contrast to the Base
SAS software options FIRSTOBS= and OBS=, the STARTOBS= and ENDOBS=
options can be used for WHERE clause processing in addition to table
input operations. When STARTOBS= is used in a WHERE expression, the
STARTOBS= value represents the first row on which to apply the WHERE
expression.