This tutorial introduces the notion of a join. The database consists of three tablesmovie,actorandcasting.
movie:
id
title
yr
director
budget
gross
actor:
id
casting:
movieid
actorid
ord
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1. 1962 movies
List the films where the yr is 1962 [Show id, title]
SELECT id, title
FROM movie
WHERE yr=1962;
2. When was Citizen Kane released?
Give year of 'Citizen Kane'.
SELECT yr
FROM movie
WHERE title = 'Citizen Kane';
3. Star Trek movies
List all of the Star Trek movies, include the id, title and yr (all of these movies include the words Star Trek in the title). Order results by year.
SELECT id, title, yr
FROM movie
WHERE title LIKE '%Star Trek%'
ORDER BY yr;
4. id for actor Glenn Close
What id number does the actor 'Glenn Close' have?
SELECT id
FROM actor
WHERE name = 'Glenn Close';
5. id for Casablanca
What is the id of the film 'Casablanca'
SELECT id
FROM movie
WHERE title = 'Casablanca';
6. Cast list for Casablanca
Obtain the cast list for 'Casablanca'.
Use movieid=11768, (or whatever value you got from the previous question)
SELECT name
FROM casting
INNER JOIN actor ON actorid = id
WHERE movieid = 11768;
7. Alien cast list
Obtain the cast list for the film 'Alien'
SELECT name
FROM casting
INNER JOIN actor ON actorid = actor.id
WHERE movieid =
(
SELECT id
FROM movie
WHERE title='Alien'
);
8. Harrison Ford movies
List the films in which 'Harrison Ford' has appeared
SELECT title
FROM movie JOIN casting
ON id = movieid
WHERE actorid =
(
SELECT id
FROM actor
WHERE name = 'Harrison Ford'
);
9. Harrison Ford as a supporting actor
List the films where 'Harrison Ford' has appeared - but not in the starring role. [Note: the ord field of casting gives the position of the actor. If ord=1 then this actor is in the starring role]
SELECT title
FROM movie
JOIN casting ON id = movieid
WHERE actorid =
(
SELECT id
FROM actor
WHERE name = 'Harrison Ford'
)
AND ord != 1;
10. Lead actors in 1962 movies
List the films together with the leading star for all 1962 films.
SELECT title, name
FROM movie
JOIN casting ON movie.id = movieid
JOIN actor ON actor.id = actorid
WHERE yr = 1962 AND ord = 1;
11. Busy years for John Travolta
Which were the busiest years for 'John Travolta', show the year and the number of movies he made each year for any year in which he made more than 2 movies.
# using subquery to get the id of John Travolta
SELECT yr, COUNT(title)
FROM movie
JOIN casting ON id = movieid
WHERE actorid = (
SELECT id
FROM actor
WHERE name = 'John Travolta'
)
GROUP BY yr
HAVING COUNT(title)>2;
# use 2 inner join
SELECT yr, count(title)
FROM casting JOIN actor ON actorid = actor.id
JOIN movie ON movie.id = movieid
WHERE name = 'John Travolta'
GROUP BY yr
HAVING count(title) > 2
ORDER BY yr;
12. Lead actor in Julie Andrews movies
List the film title and the leading actor for all of the films 'Julie Andrews' played in.
# use join and subquery
SELECT title, name
FROM movie
JOIN casting ON movie.id = movieid
JOIN actor ON actor.id = actorid
WHERE movieid IN (
SELECT movieid
FROM casting
WHERE actorid = (
SELECT id
FROM actor
WHERE name = 'Julie Andrews'
)
)
AND ord = 1;
# use inner join and self join
SELECT distinct title, a1.name
FROM casting as c1
JOIN movie ON movie.id = c1.movieid
JOIN actor as a1 ON c1.actorid = a1.id
JOIN casting as c2 ON c1.movieid = c2.movieid
JOIN actor as a2 ON c2.actorid = a2.id
WHERE a2.name = 'Julie Andrews' and c1.ord = 1;
13. Actors with 30 leading roles
Obtain a list, in alphabetical order, of actors who've had at least 30 starring roles.
SELECT name
FROM casting JOIN actor ON actorid = actor.id
WHERE ord = 1
GROUP BY name
HAVING count(movieid) >= 30
ORDER BY name;
14.
List the films released in the year 1978 ordered by the number of actors in the cast, then by title.
SELECT title, COUNT(actorid)
FROM movie
JOIN casting ON id = movieid
WHERE yr = 1978
GROUP BY title
ORDER BY COUNT(actorid) DESC, title;
15.
List all the people who have worked with 'Art Garfunkel'.
# use inner join and subquery
SELECT DISTINCT name
FROM casting
JOIN actor ON (actorid = id AND name != 'Art Garfunkel')
WHERE movieid IN
(
SELECT movieid
FROM casting
WHERE actorid = (
SELECT id
FROM actor
WHERE name = 'Art Garfunkel'
)
);
# use inner join and self join
SELECT distinct a1.name
FROM casting as c1
JOIN actor as a1 ON c1.actorid = a1.id
JOIN casting as c2 ON c1.movieid = c2.movieid and c1.actorid != c2.actorid
JOIN actor as a2 ON c2.actorid = a2.id
WHERE a2.name = 'Art Garfunkel'
ORDER BY a1.name;
