A golubev/hw 5

hw-3/ddl.txt

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+CREATE TABLE Halls (
+	id_hall 	tinyint NOT NULL,
+	name 		varchar(255) NOT NULL,
+	PRIMARY KEY (id_hall)
+);
+
+CREATE TABLE Rows (
+	id_row 			smallint NOT NULL,
+	hall_id 		tinyint NOT NULL,
+	number 			tinyint NOT NULL,
+	seats_in_row 	tinyint NOT NULL,
+	PRIMARY KEY (id_rows),
+    FOREIGN KEY (hall_id) REFERENCES Halls(id_hall)
+);
+
+CREATE TABLE Seats (
+	id_seat 	smallint NOT NULL,
+	row_id 		smallint NOT NULL,
+	number 		tinyint NOT NULL,
+	PRIMARY KEY (id_seat),
+    FOREIGN KEY (row_id) REFERENCES Rows(id_row)
+);
+
+CREATE TABLE Movies (
+	id_movie 	int NOT NULL,
+	name 		varchar(255) NOT NULL,
+	PRIMARY KEY (id_movie)
+);
+
+CREATE TABLE Sessions (
+	id_session 	int NOT NULL,
+	hall_id 	tinyint NOT NULL,
+	movie_id 	int NOT NULL,
+	price 		int NOT NULL,
+	PRIMARY KEY (id_session),
+    FOREIGN KEY (hall_id) REFERENCES Halls(id_hall),
+    FOREIGN KEY (movie_id) REFERENCES Movies(id_movie)
+);
+
+CREATE TABLE Tickets (
+	id_ticket 	int NOT NULL,
+	session_id 	int NOT NULL,
+	seat_id 	smallint NOT NULL,
+	price 		int NOT NULL,
+	PRIMARY KEY (id_ticket),
+    FOREIGN KEY (session_id) REFERENCES Sessions(id_session)
+);

hw-3/select.txt

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+SELECT 
+	s.movie_id,
+	sum(t.price) AS movie_profit
+FROM 
+	tickets AS t
+LEFT JOIN 
+	sessions AS s
+ON 
+	t.session_id = s.id
+GROUP BY
+	s.movie_id
+ORDER BY
+	movie_tickets DESC
+LIMIT 1;

hw-4/ddl.sql

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+CREATE TABLE tMovies (
+  id          SERIAL PRIMARY KEY,
+  name        varchar(140) NOT NULL UNIQUE
+);
+
+CREATE TABLE tMovieAttrs (
+  id	      SERIAL PRIMARY KEY,
+  type_id     int NOT NULL REFERENCES tMovieAttrTypes(id),
+  name        varchar(140) NOT NULL
+);
+
+CREATE TABLE tMovieAttrTypes (
+  id           SERIAL PRIMARY KEY,
+  name         varchar(50) NOT NULL UNIQUE
+);
+
+CREATE TABLE tMovieAttrValues (
+  id           SERIAL PRIMARY KEY,
+  movie_id     int NOT NULL REFERENCES tMovies(id),
+  attr_id      int NOT NULL REFERENCES tMovieAttrs(id),
+  val_text     text,
+  val_float    float(24),
+  val_int      int,
+  val_date     date
+);
+
+
+CREATE VIEW viewMovies(id, name, attr_type, attr_name, attr_value) AS
+  SELECT 
+    tMovie.id              AS id,
+    tMovie.name            AS name,
+    tMovieAttrTypes.name   AS attr_type,
+    tMoviesAttrs.name      AS attr_name,
+    COALESCE(
+      tMovieAttrValues.val_float::text,
+      tMovieAttrValues.val_int::text,
+      tMovieAttrValues.val_data::text,
+      tMovieAttrValues.val_text
+    ) AS attr_value
+  FROM 
+    tMovies
+    LEFT JOIN tMovieAttrValues ON tMovies.id = tMovieAttrValues.movie_id
+    LEFT JOIN tMovieAttrs      ON tMovieAttrValues.attr_id = tMovieAttrs.id
+    LEFT JOIN tMovieAttrTypes  ON tMovieAttrs.type_id = tMovieAttrTypes.id
+  ORDER BY
+    tMovie.id, tMovieAttrs.name;
+
+CREATE VIEW viewMoviesTasks(movie_name, today_tasks, 20_days_tasks) AS
+  WITH 
+  today_tasks AS (
+    SELECT 
+      tMovieAttrValues.movie_id
+      tMovieAttrs.name as attr_name
+    FROM
+      tMovieAttrValues
+      LEFT JOIN tMovieAttrs ON tMovieAttrValues.attr_id = tMovieAttrs.id
+    WHERE
+      tMovieAttrValues.val_date = CURRENT_DATE
+    ORDER BY
+      tMovieAttrValues.movie_id DESC
+  ),
+  20_days_tasks AS (
+    SELECT
+      tMovieAttrValues.movie_id
+      tMovieAttrs.name as attr_name
+    FROM
+      tMovieAttrValues
+      LEFT JOIN tMovieAttrs ON tMovieAttrValues.attr_id = tMovieAttrs.id
+    WHERE
+      tMovieAttrValues.val_date >= CURRENT_DATE
+      AND tMovieAttrValues.val_date <= (CURRENT_DATE + interval '20 days')
+    ORDER BY
+      tMovieAttrValues.movie_id DESC
+  )
+  SELECT
+    tMovies.name            AS movie_name,
+    today_tasks.attr_name   AS today_tasks,
+    20_days_tasks.attr_name AS 20_days_tasks
+  FROM
+    tMovies
+    LEFT JOIN today_tasks ON tMovies.id = today_tasks.movie_id
+    LEFT JOIN 20_days_tasks ON tMovies.id = 20_days_tasks.movie_id
+  ORDER BY
+    tMovies.name;
+

hw-4/dml.sql

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+INSERT INTO tMovies (name)
+VALUES
+  ('Властелин колец. Братство кольца'),
+  ('Властелин колец. Две крепости'),
+  ('Властелин колец. Возвращение короля');
+
+INSERT INTO tMovieAttrTypes ('name')
+VALUES
+  ('INTEGER'),
+  ('FLOAT'),
+  ('TEXT'),
+  ('DATE');
+
+INSERT INTO tMovieAttrs (name, type_id)
+VALUES
+  ('Базовая стоимость билета', '1'),
+  ('Рейтинг по мнению Ассоциации Киноманов','2'),
+  ('Отзывы зрителей', '3'),
+  ('Премьера в России', '4');
+
+INSERT INTO tMovieAttrValues (movie_id, attr_id, val_text, val_float, val_int, val_date)
+VALUES
+  (1, 1, null, null, 300, null),
+  (1, 2, null, 9.7, null, null),
+  (1, 3, 'Cool!', null, null, null),
+  (1, 4, null, null, null, '2002-02-07'); 
+