The SQLinDS package is based on Mike Rhoads' article Use the Full Power of SAS in Your Function-Style Macros.
The package allows to write SQL queries in the data step, e.g.
data class;
set %SQL(select * from sashelp.class order by age);
run;
SHA256 digest for the latest version of SQLinDS
: F*42DC179E1D2B946AD519C4EC04A068061B312E021C3F4BC4826D2775E116E1B9
To work with a package use the SAS Packages Framework.