-- assuming that jsontesting.data contains your JSON
WITH info_data AS (
SELECT enrolment_info->'info' AS info
FROM jsontesting t, json_array_elements(t.data -> 'Data' -> 'enrolmentInfo') AS enrolment_info
)
SELECT info_item->>'courseID',
info_item->>'school',
info_item->>'enrollmentdate',
info_item->>'finshdate',
info_item->>'grade'
FROM info_data idata, json_array_elements(idata.info) AS info_item;
