I\'m aware that you can remove keys from a jsonb in postgres using something like this
select \'{\"a\": 1, \"b\": 2, \"c\":3}\'::jsonb -\'a\'; ?column? --------
You can do this
SELECT jsonb_column->>'key_name_here' as 'column_name_of_your_own' from table_name
In the case of the query asked above, it would be
select '{"a": 1, "b": 2, "c":3}'::jsonb->>'a'