how to create a join using query module for a custom field

Its present in documentation you can follow up N/query module

documentation is pretty good for this, although the example for "right join" is actually the same as "left join"

I tried using this but didnt work var DepartmentQuery = query.create({ type: query.Type.DEPARTMENT, }); var parentpracticeJoin = DepartmentQuery.join({ fieldId: "custrecord_practicehead", }); this join of customrecord is giving error Am I doing it right?

usually you want to use the records catalog to see which joins are available, and the direction to use

Thank you