sql creating view irrelevant result error - mysql

Question

I'd like to make a view of romance movies only if it's on Netflix.
Here's the code I used and extracted pics of the result.
Sadly, I got a redundant result including not related movie lists.
CREATE VIEW DB2020_romance_on_netflix AS
SELECT
distinct(DB2020_MOVIEINFO.MOVIE_ID), DB2020_MOVIEINFO.title, DB2020_MOVIEINFO.plot, DB2020_genre.genre, DB2020_ON_NETFLIX.on_netflix
FROM
DB2020_genre, DB2020_MOVIEINFO, DB2020_ON_NETFLIX
WHERE
DB2020_genre.genre = 'romance' and
DB2020_genre.mov_id in (SELECT mov_id
FROM DB2020_ON_NETFLIX
WHERE on_netflix = 'yes');
select * from DB2020_romance_on_netflix;
Here's more code needed for checking.
CREATE TABLE DB2020_MOVIEINFO (
MOVIE_ID Int primary key,
title VARCHAR(30) NOT NULL,
plot VARCHAR(500) NOT NULL,
main_target VARCHAR(10) NOT NULL,
country char(6) NOT NULL,
INDEX (MOVIE_ID)
);
DESCRIBE DB2020_MOVIEINFO;
INSERT INTO DB2020_MOVIEINFO VALUES (1, 'Parasite', 'Greed and class discrimination threaten the newly formed symbiotic relationship between the wealthy Park family and the destitute Kim clan.','Adult','Korea');
INSERT INTO DB2020_MOVIEINFO VALUES (2, 'Before Sunset', 'Celine and Jesse, who met nine years ago in Vienna, cross paths again for a single day in Paris. Together, they try to find out what might have happened if they had acted on their feelings back then.','Adult','US');
INSERT INTO DB2020_MOVIEINFO VALUES (3,'Before Sunrise', 'While travelling on a train in Europe, Jesse, an American man, meets Celine, a French woman. On his last day in Europe before returning to the US, he decides to spend his remaining hours with her.','All', 'US');
CREATE TABLE DB2020_genre(
mov_id INT NOT NULL,
genre VARCHAR(15) NOT NULL,
release_date DATE NOT NULL,
INDEX (genre),
PRIMARY KEY (mov_id, genre),
FOREIGN KEY (mov_id) REFERENCES DB2020_MOVIEINFO(MOVIE_ID)
ON DELETE CASCADE ON UPDATE CASCADE);
DESCRIBE DB2020_genre;
INSERT INTO DB2020_genre VALUES (1, 'thriller',str_to_date('20190530','%Y%m%d') );
INSERT INTO DB2020_genre VALUES (2, 'romance',str_to_date('20041024','%Y%m%d'));
INSERT INTO DB2020_genre VALUES (3, 'romance',str_to_date('19960316','%Y%m%d'));
CREATE TABLE DB2020_ON_NETFLIX(
mov_id INT NOT NULL,
on_netflix VARCHAR(10) NOT NULL,
service_start_year VARCHAR(10),
PRIMARY KEY (mov_id, on_netflix),
INDEX(mov_id),
FOREIGN KEY (mov_id) REFERENCES DB2020_MOVIEINFO(MOVIE_ID)
ON DELETE CASCADE ON UPDATE CASCADE);
DESCRIBE DB2020_ON_NETFLIX;
INSERT INTO DB2020_ON_NETFLIX VALUES (1, 'no', NULL);
INSERT INTO DB2020_ON_NETFLIX VALUES (2, 'yes', '2018');
INSERT INTO DB2020_ON_NETFLIX VALUES (3, 'yes', '2018');
I wonder what made this problem. Big thanks in advance for helping me.

Answer 1

This worked. natural join made some redundancies. applying left outer join helped.
CREATE VIEW DB2020_romance_on_netflix AS
SELECT
DB2020_MOVIEINFO.title, DB2020_MOVIEINFO.plot, DB2020_genre.genre
FROM
DB2020_genre left outer join DB2020_MOVIEINFO on DB2020_genre.MOVIE_ID = DB2020_MOVIEINFO.MOVIE_ID
WHERE
DB2020_genre.genre = 'romance' and
DB2020_genre.MOVIE_ID in (SELECT MOVIE_ID
FROM DB2020_ON_NETFLIX
WHERE on_netflix = 'yes');