Main thing is making sure that people have example data. Having a table query that creates exmple tables (and therefore describes the schema), as well as some sample data to play around with along with queries and their expected outputs, is the best way to ensure getting the answer you need. E.g. https://stackoverflow.com/questions/70734268/sql-select-from-table-where-joined-values-from-a-second-table-are-a-subset-of-va