桌子:
CREATE TABLE appointment
(
id bigserial NOT NULL,
date_of_visit timestamp without time zone NOT NULL,
symptoms text[],
diseases text[],
lab_tests text[],
prescription_id bigint NOT NULL,
medicines jsonb,
CONSTRAINT appointment_pkey PRIMARY KEY (id),
CONSTRAINT appointment_prescription_id_fkey FOREIGN KEY (prescription_id)
REFERENCES prescription (id) MATCH SIMPLE
ON UPDATE NO ACTION ON DELETE NO ACTION
)
WITH (
OIDS=FALSE
);
插入语句:
INSERT INTO appointment values(
1,
now(),
'{"abc","def","ghi"}',
'{"abc","def","ghi"}',
'{"abc","def","ghi"}',
1,
'[{"sku_id": 1, "company": "Magnafone"}, {"sku_id": 2, "company": "Magnafone"}]')
我正在尝试查询 postgres 中的 jsonb 数组类型列。我手头有一些解决方案,如下所示。不知何故它不起作用错误是 - Cannot extract elements from a scalar
。
SELECT distinct(prescription_id)
FROM appointment
WHERE to_json(array(SELECT jsonb_array_elements(medicines) ->>'sku_id'))::jsonb ?|array['1']
LIMIT 2;
更新:查询运行得很好。对于其他一些行,列中有一些不需要的值,因此它没有运行。