I have such pipeline:

1. In Script activity I am selecting list of IDs difference between two tables:
   SELECT id
   FROM a
   where not exists (
   select * from b where a.id= b.id
   )

2. In ForEach activity I have (Items = @activity(‘Script1’).output.resultSets[0].rows):
   Set pipeline variable activity = activity(‘Script1’).output.resultSets[0].rows[0].ID

   Copy data activity = I can call API (several ids, separated by comma as well can be called as well), currently the requested body is like this:
   @concat(‘{“id”:[‘, ‘”‘, activity(‘Script1’).output.resultSets[0].rows[0].id, ‘”‘, ‘]}’)

I want the pipeline to iterate through the list that I am getting when select IDs. How can I achieve that? Currently, it is not working, and taking the same ID endless amount of times.