That said - if you take a full PSQL course - they are going to teach you as though you are writing against a database directly. Since you are not - and you are using a user interface to write PSQL to the database, your options are limited and you have to half think through how to write it with that piece in mind. I had some classic database skills prior to learning NetSuite that really helped me in my saved searches from just understanding what it was doing, but the SQL aspect of most searches that I write is very limited