I am learning to use QGIS and want to know which language to input in the expression builder. I just want to know what to learn. The GIS stack exchange won't let my question be answered (because it involves coding?) so please help me!
I've had some success using input similar to SQL, but I don't know where to look up more info without knowing which language I need to use. Would I use Pyqgis, some specific form of SQL?
python. Here's the documentation https://docs.qgis.org/3.34/en/docs/user_manual/expressions/expression.html#id10