As stated in your other thread, SAS isn't using the same syntax that your previous RDBMS does.
SAS uses ANSI 92 SQL, with some extensions.
If you get a syntax error in your SQL, please go to support.sas.com and search first. It's gonna be tedious to post every similar issue here...
Also, there are some pretty good overviews of SAS SQL there as well.
Learn the difference between classical and Bayesian statistical approaches and see a few PROC examples to perform Bayesian analysis in this video.
Find more tutorials on the SAS Users YouTube channel.