SQL Moving Rating Practice by Han Wang 20200720, PostgreSQL

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drop table if exists HanW_movie;
drop table if exists HanW_reviewer;
drop table if exists HanW_rating;

create table HanW_movie("mid" int, "title" text, "year" int, "director" text);
create table HanW_reviewer("rid" int, "name" text);
create table HanW_rating1("rid" int, "mid" int, "stars" int, "ratingdate" date);

insert into HanW_movie("mid","title","year","director") 
values
(101, 'Gone with the Wind', 1939, 'Victor Fleming'),
(102, 'Star Wars', 1977, 'George Lucas'),
(103, 'The Sound of Music', 1965, 'Robert Wise'),
(104, 'E.T.', 1982, 'Steven Spielberg'),
(105, 'Titanic', 1997, 'James Cameron'),
(106, 'Snow White', 1937, null),
(107, 'Avatar', 2009, 'James Cameron'),
(108, 'Raiders of the Lost Ark', 1981, 'Steven Spielberg');

insert into HanW_reviewer("rid","name") 
values
(201, 'Sarah Martinez'),
(202, 'Daniel Lewis'),
(203, 'Brittany Harris'),
(204, 'Mike Anderson'),
(205, 'Chris Jackson'),
(206, 'Elizabeth Thomas'),
(207, 'James Cameron'),
(208, 'Ashley White');

insert into HanW_rating1("rid", "mid", "stars", "ratingdate")
values
(201, 101, 2, '2011-01-22'),
(201, 101, 4, '2011-01-27'),
(202, 106, 4, null),
(203, 103, 2, '2011-01-20'),
(203, 108, 4, '2011-01-12'),
(203, 108, 2, '2011-01-30'),
(204, 101, 3, '2011-01-09'),
(205, 103, 3, '2011-01-27'),
(205, 104, 2, '2011-01-22'),
(205, 108, 4, null),
(206, 107, 3, '2011-01-15'),
(206, 106, 5, '2011-01-19'),
(207, 107, 5, '2011-01-20'),
(208, 104, 3, '2011-01-02');

-- HanW_movie("mid", "title", "year", "director");
-- HanW_reviewer("rid", "name");
-- HanW_rating1("rid", "mid", "stars", "ratingdate");
-- Q1 Find the titles of all movies directed by Steven Spielberg
SELECT DISTINCT title
FROM HanW_movie
WHERE director in ('Steven Spielberg')
;
--Q2 Q3 Q4 Q5 Q6 Q7 Q8


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