INSERT INTO person (info) VALUES ('[{"num":"1","name":"张三","score":"90"}]'::jsonb);

UPDATE person SET info = info || '[{"num":"2","name":"李四","score":"91"}]'::jsonb;

SELECT t.* FROM person, jsonb_to_record(info) AS t(num text, name text, score text) WHERE person.id=1;

CREATE TABLE rt_person_info(no text, name text, score text);
SELECT t.* FROM person, jsonb_populate_recordset(null::rt_person_info, info) WHERE person.id=1;

SELECT * FROM person WHERE info @> '[{"num":"1"}]'::jsonb;

UPDATE person t1 SET info = jsonb_set(info, array[(SELECT ORDINALITY::INT - 1 FROM person t2, jsonb_array_elements(info) WITH 
ORDINALITY WHERE t1.id = t2.id AND value->>'num' = '1')::text, 'score'::text], '"92"') WHERE id = '1'