用於存儲發送消息和收到同一個人的消息的數據庫模式

Question

我試圖想出一個模式來存儲來自SMS應用程序的消息。它需要存儲從發件人發送的郵件和發送給該發件人的郵件。如果有人能告訴我這樣做的最佳方式，那麼非常感謝。如果這有什麼不同，我使用Postgresql。

Answer 1

這裏是你可以做什麼brievly：

表聯繫人：

CREATE TABLE contact 
(
    contact_id bigserial NOT NULL, 
    contact_name character varying, 
    contact_phone_number character varying(40), 
    CONSTRAINT contact_pkey PRIMARY KEY (contact_id) 
) 
WITH (
    OIDS=FALSE 
); 

而短信標籤le：

CREATE TABLE sms 
(
    msg_id bigint NOT NULL DEFAULT nextval('message_msg_id_seq'::regclass), 
    sender_id bigint, 
    receiver_id bigint, 
    msg_content text, 
    CONSTRAINT message_pkey PRIMARY KEY (msg_id), 
    CONSTRAINT sms_receiver_id_fkey FOREIGN KEY (receiver_id) 
     REFERENCES contact (contact_id) MATCH SIMPLE 
     ON UPDATE NO ACTION ON DELETE NO ACTION, 
    CONSTRAINT sms_sender_id_fkey FOREIGN KEY (sender_id) 
     REFERENCES contact (contact_id) MATCH SIMPLE 
     ON UPDATE NO ACTION ON DELETE NO ACTION 
    ) 
WITH (
    OIDS=FALSE 
); 

Answer 2

您可以用兩個表做到這一點：

用戶表：id, name, {other info about your user}

信息表：id, sender, receiver, message, {other info about message}