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Lab | SQL Self and cross join[ANDERSON CASAGRANDE] #32

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Lab | SQL Self and cross join[ANDERSON CASAGRANDE] #32

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20 changes: 20 additions & 0 deletions Lab SQL Self and cross join.sql
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-- 1. Get all pairs of actors that worked together.
SELECT FA1.ACTOR_ID AS ACTOR_ID_FIRST, FA2.ACTOR_ID AS ACTOR_ID_SECOND, FA1.FILM_ID
FROM SAKILA.FILM_ACTOR FA1
INNER JOIN SAKILA.FILM_ACTOR FA2
ON FA1.FILM_ID = FA2.FILM_ID
AND FA1.ACTOR_ID <> FA2.ACTOR_ID;

-- Get all pairs of customers that have rented the same film more than 3 times.
SELECT R1.CUSTOMER_ID AS CUSTOMER1, R2.CUSTOMER_ID AS CUSTOMER2, COUNT(*) AS RENTAL_COUNT
FROM SAKILA.RENTAL R1
JOIN SAKILA.RENTAL R2
ON R1.INVENTORY_ID = R2.INVENTORY_ID
AND R1.CUSTOMER_ID <> R2.CUSTOMER_ID
GROUP BY CUSTOMER1, CUSTOMER2
HAVING COUNT(*) > 3;

-- Get all possible pairs of actors and films.
SELECT Film_actor.ACTOR_ID, Film.FILM_ID, Film.TITLE
FROM SAKILA.FILM_ACTOR Film_actor
CROSS JOIN SAKILA.FILM Film;