/* Лабораторная работа #1 || Вариант 4 || Антипенко */


CREATE table countries (
    id numeric(3) PRIMARY KEY NOT NULL,
  
    name_country varchar(64) NOT NULL
);

CREATE table schedules (
    id integer PRIMARY KEY,
  
    dt_dep timestamp without time zone NOT NULL,
    dt_arr timestamp without time zone NOT NULL,
    plс_of_dep varchar(2000) NOT NULL default 'Москва',
    plc_of_arr varchar(2000) NOT NULL,
    tpe varchar(9) NOT NULL 
    CHECK(tpe = 'Скорый' OR tpe = 'Фирменный' OR tpe = 'Обычный'),
  
    cnt_stops integer CHECK(cnt_stops > 0),
  
    id_oper numeric(3) references countries(id) not null
);

INSERT into countries VALUES 
    (321, 'Россия');
    
INSERT into schedules VALUES
    (1, '1999-01-08 04:05:06', '1999-01-08 04:05:06', default, 'СПб', 'Скорый', 40, 321);

SELECT * FROM countries;
SELECT * FROM schedules;