JSON object values into CSV with jq

TIMTOWTDI:

  $ jq -n -r '[{"a": "b", "foo": "bar"}, {"c": "d", "baz": "quux"}] | .[] | [ keys_unsorted[] as $k | .[$k] ] | @csv'
  "b","bar"
  "d","quux"

  $ jq -n -r '[{"a": "b", "foo": "bar"}, {"c": "d", "baz": "quux"}] | .[] | to_entries | map(.value) | @csv'
  "b","bar"
  "d","quux"

FWIW, OP uses `keys` instead of `keys_unsorted` which makes a specific assumption about the shape of the input objects. YMMV.