我工作的PostgreSQL數據庫上,我有一個問題:PostgreSQL的外鍵整數[]是指整數
我想創建一個列categories_ids表申請人(即意味着申請人可以有多個類別),我想創建一個外鍵約束之間的這個列和類別表的列ID。但是pgAdmin的說,這是不可能的:
foreign key constraint "fk_categories_ids" cannot be implemented
DÉTAIL : Key columns "categories_ids" and "id" are of incompatible types: integer[] and integer.
編輯1:
CREATE TABLE public.applicants
(
-- Hérité(e) from table users: id integer NOT NULL DEFAULT nextval('users_id_seq'::regclass),
-- Hérité(e) from table users: email character(60) NOT NULL,
-- Hérité(e) from table users: "firstName" character(50) NOT NULL,
-- Hérité(e) from table users: "lastName" character(50) NOT NULL,
-- Hérité(e) from table users: password character(50) NOT NULL,
-- Hérité(e) from table users: role_id integer NOT NULL DEFAULT nextval('users_role_id_seq'::regclass),
home boolean NOT NULL,
"fullTime" boolean,
"partTime" boolean NOT NULL,
freelance boolean NOT NULL,
internship boolean NOT NULL,
"minSalary" integer,
domain_id integer,
categories_ids integer[],
skills_ids integer[],
locations_ids integer[],
"jobExperiences_ids" integer[],
CONSTRAINT pk_applicant_id PRIMARY KEY (id),
CONSTRAINT fk_domain_id FOREIGN KEY (domain_id)
REFERENCES public.domains (id) MATCH SIMPLE
ON UPDATE NO ACTION ON DELETE NO ACTION
)
INHERITS (public.users)
WITH (
OIDS=FALSE
);
這根本不被支持。規範化你的數據模型,然後你可以創建一個合適的外鍵 –
是的,但我不知道如何建模這個配置,我真的剛開始在數據庫上工作,你能告訴我怎麼做? –
您正在尋找關係設計中的「一對多關係」 –