Considere o trecho de comandos executados sob o PostgreSQL 9.3:

CREATE TABLE IF NOT EXISTS person (

id serial NOT NULL PRIMARY KEY,

info json NOT NULL

);

INSERT INTO person (info)

VALUES ('{ "student": "James Miller", "items": {"course": "calculus I","grade": 8.5}}'),

('{ "student": "Mary Martinez", "items": {"course": "calculus II","grade": 7.5}}'),

('{ "student": "Linda Olson", "items": {"course": "calculus II","grade": 9.0}}');

SELECT info FROM person;

É CORRETO afirmar que: