if I want to put a component to my report table ,which can self-defined some dropdown selections ,which component can I use ? And how to use it make these seil defined selections?
You can self define whats in the dropdown using the dataset viewer.
If you want to mix self defined with a query you could make a query that looks something like this:
select 'test' as displayname, 1001 as id union all select 'test2' as displayname, 1002 as id union all SELECT displayname, id FROM devices