SQLinDS
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: A070214517CC36590083FCF9D5F488AC6E746793E94B9AA55D09A419CF291B5B
Documentation for SQLinDS