When you are using the explicit pass through method, you are required to code all options you already did with a libname.
A new separate connection is build and nothing is shared from previous ones (unless you are using dedicated options).
Both approaches are part of normal SAS. Documented with SAS/ACCESS. What are you using?
With Easy common standard SQL there is no need to code a "connect to", all is translated by SAS as an implicit pass through processing.
---->-- ja karman --<-----