-- ///////////////////////////////////Создание таблиц///////////////////////////////////////////////

DROP TABLE person;

CREATE TABLE person (
    id int primary key generated always as identity (start with 1, increment by 1),
    full_name varchar(100) not null,
    birthday date
);

DROP TABLE BUILDING;

CREATE TABLE building (
    id int primary key generated always as identity (start with 1, increment by 1),
    address varchar(200) not null unique,
    date_build date,
    status varchar(50),
    CHECK (status in ('строится', 'сдано')),
    CHECK (status='строится' and date_build is null or status='сдано' and date_build is not null)
);

ALTER TABLE building ADD COLUMN person_id int;
ALTER TABLE building ADD COLUMN COUNT_MEN int;
ALTER TABLE building ADD CONSTRAINT fk_personId_person FOREIGN KEY (person_id) REFERENCES person(id);

INSERT INTO BUILDING (ADDRESS, DATE_BUILD, STATUS) VALUES ('Saint Petersburg', '2022-01-16', 'сдано');
INSERT INTO BUILDING (ADDRESS, STATUS) VALUES ('Saint Petersburg, Green st.', 'строится');

-- ////////////////////////////Наполнение таблиц данными//////////////////////////////////////
INSERT INTO PERSON (FULL_NAME, BIRTHDAY) VALUES ('Muhin Vadim', '1985-10-25');
INSERT INTO PERSON (FULL_NAME, BIRTHDAY) VALUES ('Ivanov Andrey', '1999-11-15');
INSERT INTO PERSON (FULL_NAME, BIRTHDAY) VALUES ('Sergeev Sergey', '1991-05-02');
INSERT INTO PERSON (FULL_NAME, BIRTHDAY) VALUES ('Antonov Victor', '1989-09-10');
INSERT INTO PERSON (FULL_NAME, BIRTHDAY) VALUES ('Petrov Sergey', '1987-07-29');

INSERT INTO BUILDING (ADDRESS, DATE_BUILD, STATUS, PERSON_ID) VALUES ('Saint Petersburg, Nevskiy', '1999-10-10', 'сдано', 6);
INSERT INTO BUILDING (ADDRESS, DATE_BUILD, STATUS) VALUES ('Saint Petersburg, Chkalovskiy', '1895-10-25', 'сдано');
INSERT INTO BUILDING (ADDRESS, DATE_BUILD, STATUS, PERSON_ID) VALUES ('Saint Petersburg, Morskaya', '1990-05-06', 'сдано', 6);
INSERT INTO BUILDING (ADDRESS, DATE_BUILD, STATUS) VALUES ('Saint Petersburg, Konuschenaya', '1999-08-07', 'сдано');
INSERT INTO BUILDING (ADDRESS, DATE_BUILD, STATUS, PERSON_ID) VALUES ('Saint Petersburg, Nalichnays', '1999-10-07', 'сдано', 7);
INSERT INTO BUILDING (ADDRESS, DATE_BUILD, STATUS) VALUES ('Saint Petersburg, Kostuschko', '1998-05-01', 'сдано');
INSERT INTO BUILDING (ADDRESS, DATE_BUILD, STATUS, PERSON_ID) VALUES ('Saint Petersburg, Veteranov', '2003-12-26', 'сдано', 8);
INSERT INTO BUILDING (ADDRESS, STATUS) VALUES ('Saint Petersburg, Kosmonavtov', 'строится');

DELETE FROM BUILDING WHERE ADDRESS LIKE '%N%';
DELETE FROM PERSON;

UPDATE PERSON SET FULL_NAME = 'Krot Evgeniy' WHERE id=6;

-- ////////////////////////////////Запросы данных из БД//////////////////////////////////////////////
SELECT ID, ADDRESS, DATE_BUILD, STATUS, PERSON_ID FROM BUILDING;
SELECT COUNT(ID) FROM BUILDING;
SELECT DISTINCT(STATUS) FROM BUILDING;
SELECT COUNT(DISTINCT(STATUS)) FROM BUILDING;
SELECT * FROM BUILDING WHERE DATE_BUILD > '1995-01-01' AND STATUS='сдано';

SELECT * FROM PERSON LEFT JOIN BUILDING ON PERSON.ID = BUILDING.PERSON_ID;
SELECT * FROM PERSON RIGHT JOIN BUILDING ON PERSON.ID = BUILDING.PERSON_ID;
SELECT * FROM PERSON INNER JOIN BUILDING ON PERSON.ID = BUILDING.PERSON_ID;

SELECT p.ID, p.FULL_NAME, b.ADDRESS FROM PERSON p LEFT JOIN BUILDING b ON p.ID = b.PERSON_ID WHERE b.PERSON_ID is null;
SELECT * FROM PERSON RIGHT JOIN BUILDING ON PERSON.ID = BUILDING.PERSON_ID WHERE BUILDING.PERSON_ID is null;
SELECT * FROM BUILDING WHERE PERSON_ID is null;
SELECT * FROM PERSON FULL JOIN BUILDING ON PERSON.ID = BUILDING.PERSON_ID;

-- Получить персон у которых здания построены в 1999 году
SELECT * FROM PERSON LEFT JOIN BUILDING ON PERSON.ID = BUILDING.PERSON_ID WHERE DATE_BUILD >= '1999-01-01' AND DATE_BUILD <= '1999-12-31';

-- Синтетический пример с несуществующей третьей таблицей
SELECT * FROM PERSON 
    LEFT JOIN 
    (SELECT * FROM BUILDING RIGHT JOIN CADASTR ON BUILDING.ID = CADASTR.BUILDING_ID) AS cad 
    ON PERSON.ID = cad.PERSON_ID;