NX language examples - where?

Tnx for answer. The language referens is read over and over again, in its full. Not much help for a beginner with Ninox, mostly useless as there is no explanation of the syntax. It just use frases like <expression>. WHAT expression, how's the syntax and what expression is possible to use? 
When that is said; I do program a lot - languages like php, xojo, Javascript, Object C, Swift - but they got MANUALS that teach you the language syntax and a load of tutorials. NX don't - and nobody ever put anything on the web outside the unsearchable Ninox forum. Thats why I dont get links; there are none! The search function in forum seams to only accept one-word search and ignores two- or more word search, so I can't search for like "switch multi-choice field" and so forth. Getting very frustrated due to this and feel I wasted money on a database tool weaker than the 90s hyperstacks. However, the UI is great - just to say something positive :)