Join values of two tables that represent the missing values between those tables in SQLITE - sqlite

Question

I have the following table
CREATE TABLE holes (`tournament_id` INTEGER, `year` INTEGER, `course_id` INTEGER, `round` INTEGER, `hole` INTEGER, `front` INTEGER, `side` INTEGER, `region` INTEGER);
With the following data sample
INSERT INTO holes (`tournament_id`, `year`, `course_id`, `round`, `hole`, `front`, `side`, `region`) VALUES
('33', '2016', '895', '1', '1', '12', '5', 'L'),
('33', '2016', '895', '1', '2', '18', '10', 'R'),
('33', '2016', '895', '1', '3', '15', '7', 'R'),
('33', '2016', '895', '1', '4', '11', '7', 'R'),
('33', '2016', '895', '1', '5', '18', '7', 'L'),
('33', '2016', '895', '1', '6', '28', '5', 'L'),
('33', '2016', '895', '1', '7', '21', '12', 'R'));
In addition, I have another table tournaments
CREATE TABLE tournaments (`tournament_id` INTEGER, `year` INTEGER, `R1` INTEGER, `R2` INTEGER, `R3` INTEGER, `R4` INTEGER);
With data
INSERT INTO tournaments VALUES
(33, 2016, 715, 715, 895, 400);
The values for R1, R2, R3 and R4 present ids of the courses.
I want the columns tournament_id, year and course_id that are missing in table holes based on all the possible values of table tournaments.
With the help of this answer I tried the following:
WITH h AS (
SELECT DISTINCT tournament_id, year, course_id
FROM holes)
SELECT t.tournament_id, t.year
FROM tournaments t
WHERE NOT EXISTS (
SELECT *
FROM h
WHERE h.tournament_id = t.tournament_id
AND h.year = t.year
AND h.course_id IN (t.R1, t.R2, t.R3, t.R4)
);
demo
The above goes a long way but I also want the h.course_id that is/are missing. Desired result:
33 2016 715
33 2016 400
These combinations of tournament_id, year and course_id are not present in holes. However, they do exists because they are present in tournaments.

Answer 1

For this requirement you need a resultset consisting of all the values of the Rx columns which you can get with UNION in a CTE.
Then you can use NOT EXISTS to get all the combinations of id, year and course that do not exist in holes:
WITH cte AS (
SELECT id, year, R1 AS course FROM tournaments
UNION
SELECT id, year, R2 FROM tournaments
UNION
SELECT id, year, R3 FROM tournaments
UNION
SELECT id, year, R4 FROM tournaments
)
SELECT c.*
FROM cte c
WHERE NOT EXISTS (
SELECT *
FROM holes h
WHERE (h.id, h.year, h.course) = (c.id, c.year, c.course)
);
See the demo.