# ログイン
psql -U suti7 -d dislocker

CREATE TABLE club_member (id SERIAL NOT NULL, name VARCHAR(30) NOT NULL, discord_username VARCHAR(32) NOT NULL, discord_userid VARCHAR(18) NOT NULL, PRIMARY KEY (id));
CREATE TABLE pc_usage_history (id SERIAL NOT NULL, member_id INTEGER NOT NULL, pc_number INTEGER NOT NULL, device_number INTEGER NOT NULL, start_use_time TIMESTAMP NOT NULL, end_use_time TIMESTAMP, use_detail VARCHAR(30), PRIMARY KEY (id), FOREIGN KEY (member_id) REFERENCES club_member(id));

INSERTのとき文字列はシングルクォーテーションで囲む！！！