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*3C010734B76CA7459C4D35087C899121011CD4AA2932B56335FF11A805C8EF8D
To work with a package use the SAS Packages Framework.