{ "format": "dataset-manifest/1", "slug": "cinema-sample-database", "version": 1, "seed": "flagship:cinema-sample-database:1k", "engine": 2, "engineVersion": "1.0.0", "spec": { "format": "dataset/1", "engine": 2, "slug": "cinema-sample-database", "name": "Cinema sample database", "tagline": "Theaters, screens and numbered seats, films and showtimes, ticket orders with concessions, promotions and refunds.", "description": "Three cinema chains with twelve theaters in eight US cities, from mid-2023 to the end of 2025: screens with numbered seats in lettered rows, a hundred and twenty films and their showtimes, and customers buying tickets and snacks. A ticket is for a seat on its show’s own screen, and no seat is sold twice for one show; every ticket of an order is for the same show. A ticket costs the show’s base price times its seat type’s factor, and an order is its tickets and concessions less its promotion’s percentage, charged in one transaction. A film plays from its release for up to eight weeks, a show runs at least ten minutes longer than its film, and a ticket is bought ten minutes to two weeks before the lights go down.", "domain": "media", "shape": "transactional", "useCases": [ "sql-practice", "analytics-demo", "test-fixtures" ], "keywords": [ "cinema", "movie tickets", "showtimes", "seats", "sample database" ], "locale": "en_US", "license": "CC0-1.0", "version": 1, "seed": "flagship:cinema-sample-database", "tables": { "addresses": { "description": "Rows for the addresses table.", "rows": 12, "columns": { "id": { "kind": "pk" }, "building_number": { "kind": "location.buildingNumber" }, "city_id": { "kind": "fk", "ref": "cities.id", "skew": "flat" }, "latitude": { "kind": "decimal", "min": 0, "max": 48, "scale": 4 }, "longitude": { "kind": "decimal", "min": -123, "max": 0, "scale": 4 }, "street": { "kind": "location.street" } } }, "chains": { "description": "Rows for the chains table.", "rows": 3, "columns": { "id": { "kind": "pk" }, "logo_url": { "kind": "pattern", "pattern": "[https://cdn.example.com/logos/]xxxxxxxx[.png]" }, "name": { "kind": "enum", "values": [ "Starlight Cinemas", "Marquee Theaters", "Reel House" ], "unique": true }, "website_url": { "kind": "internet.url" } } }, "cities": { "description": "Rows for the cities table.", "rows": 8, "columns": { "id": { "kind": "pk" }, "country_id": { "kind": "fk", "ref": "countries.id" }, "name": { "kind": "enum", "values": [ "Seattle", "Portland", "Denver", "Minneapolis", "Atlanta", "Boston", "Nashville", "Columbus" ], "unique": true }, "postal_code": { "kind": "enum", "values": [ "98101", "97204", "80202", "55402", "30303", "02108", "37203", "43215" ], "unique": true } } }, "concession_items": { "description": "Rows for the concession_items table.", "rows": 15, "columns": { "id": { "kind": "pk" }, "category": { "kind": "enum", "values": [ "Bar", "Candy", "Combos", "Drinks", "Snacks" ] }, "description": { "kind": "enum", "values": [ "Made fresh", "Fan favourite", "Great for sharing", "Ask about refills" ] }, "image_url": { "kind": "pattern", "pattern": "[https://cdn.example.com/menu/]xxxxxxxx[.jpg]" }, "name": { "kind": "enum", "values": [ "Small popcorn", "Medium popcorn", "Large popcorn", "Nachos", "Hot dog", "Pretzel bites", "Candy box", "Chocolate bar", "Small soda", "Large soda", "Bottled water", "Iced coffee", "Beer", "Glass of wine", "Combo: large popcorn and two sodas" ], "unique": true }, "price": { "kind": "decimal", "min": 3, "max": 20, "scale": 2 } } }, "content_ratings": { "description": "Rows for the content_ratings table.", "rows": 5, "columns": { "id": { "kind": "pk" }, "description": { "kind": "enum", "values": [ "General audiences", "Parental guidance suggested", "Parents strongly cautioned", "Restricted", "Adults only" ], "unique": true }, "minimum_age": { "kind": "int", "min": 0, "max": 18 }, "rating_code": { "kind": "enum", "values": [ "G", "PG", "PG-13", "R", "NC-17" ], "unique": true } } }, "countries": { "description": "Rows for the countries table.", "rows": 1, "columns": { "id": { "kind": "pk" }, "currency": { "kind": "enum", "values": [ "USD" ] }, "iso_code": { "kind": "enum", "values": [ "US" ] }, "name": { "kind": "enum", "values": [ "United States" ] } } }, "device_tokens": { "description": "Rows for the device_tokens table.", "rows": 50, "columns": { "id": { "kind": "pk" }, "device_type": { "kind": "enum", "values": [ "ios", "android", "web" ], "weights": [ 45, 40, 15 ] }, "last_used_at": { "kind": "datetime", "from": "2025-01-01", "to": "2025-12-31" }, "token": { "kind": "pattern", "pattern": "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx", "unique": true }, "user_id": { "kind": "fk", "ref": "users.id", "skew": "flat" } } }, "facilities": { "description": "Rows for the facilities table.", "rows": 8, "columns": { "id": { "kind": "pk" }, "description": { "kind": "enum", "values": [ "Large-format screen", "Object-based surround sound", "Power reclining seats", "3D projection", "Beer, wine and cocktails", "On-site parking", "Step-free access and spaces", "Games in the lobby" ], "unique": true }, "name": { "kind": "enum", "values": [ "IMAX", "Dolby Atmos", "Recliners", "3D", "Bar", "Free parking", "Wheelchair access", "Arcade" ], "unique": true } } }, "genres": { "description": "Rows for the genres table.", "rows": 10, "columns": { "id": { "kind": "pk" }, "description": { "kind": "enum", "values": [ "Chases, fights and stunts", "Made to make you laugh", "Character-driven stories", "Made to frighten", "Futures and other worlds", "Drawn or computer-animated", "Suspense and danger", "Love stories", "True stories", "For all ages" ], "unique": true }, "name": { "kind": "enum", "values": [ "Action", "Comedy", "Drama", "Horror", "Science fiction", "Animation", "Thriller", "Romance", "Documentary", "Family" ], "unique": true } } }, "movie_crews": { "description": "Rows for the movie_crews table.", "rows": 1200, "columns": { "id": { "kind": "pk" }, "character_name": { "kind": "person.fullName" }, "movie_id": { "kind": "fk", "ref": "movies.id", "skew": "flat" }, "person_id": { "kind": "fk", "ref": "people.id" }, "role": { "kind": "enum", "values": [ "Actor" ] } } }, "movie_genres": { "description": "Rows for the movie_genres table.", "rows": 220, "columns": { "id": { "kind": "pk" }, "genre_id": { "kind": "fk", "ref": "genres.id", "skew": "flat" }, "movie_id": { "kind": "fk", "ref": "movies.id", "skew": "flat" } } }, "movies": { "description": "Rows for the movies table.", "rows": 120, "columns": { "id": { "kind": "pk" }, "content_rating_id": { "kind": "fk", "ref": "content_ratings.id", "weights": [ 8, 22, 40, 27, 3 ] }, "duration_minutes": { "kind": "int", "min": 85, "max": 150, "distribution": "normal" }, "language": { "kind": "enum", "values": [ "English", "Spanish", "French", "Korean", "Japanese", "Hindi" ], "weights": [ 80, 5, 4, 4, 4, 3 ] }, "original_title": { "kind": "enum", "values": [ "La sombra del puerto", "Le dernier signal", "Bam-ui jeong-won", "Yoru no eki", "Raat ki roshni" ], "nullable": true, "nullRate": 0.85 }, "poster_url": { "kind": "pattern", "pattern": "[https://cdn.example.com/posters/]xxxxxxxxxx[.jpg]" }, "release_date": { "kind": "date", "from": "2023-05-01", "to": "2025-11-30" }, "synopsis": { "kind": "enum", "values": [ "A heist goes wrong", "Two strangers on a long journey", "A family secret comes out", "The last mission before retirement", "A small town meets something it cannot explain", "A comeback against the odds" ] }, "title": { "kind": "book.title", "unique": true }, "trailer_url": { "kind": "pattern", "pattern": "[https://video.example.com/trailers/]xxxxxxxxxx" } } }, "notifications": { "description": "Rows for the notifications table.", "rows": 50, "columns": { "id": { "kind": "pk" }, "is_read": { "kind": "bool", "trueRate": 0.7 }, "message": { "kind": "enum", "values": [ "Your tickets are in the app", "A film you saved is now showing", "Your show starts in one hour", "Your refund is on its way" ] }, "sent_at": { "kind": "datetime", "from": "2023-05-01", "to": "2025-12-31" }, "title": { "kind": "enum", "values": [ "Your tickets", "Now showing", "Show reminder", "Refund processed" ] }, "user_id": { "kind": "fk", "ref": "users.id" } } }, "order_concessions": { "description": "Rows for the order_concessions table.", "rows": 300, "columns": { "id": { "kind": "pk" }, "concession_item_id": { "kind": "fk", "ref": "concession_items.id", "weights": [ 10, 18, 12, 8, 7, 5, 9, 6, 9, 10, 6, 4, 3, 2, 8 ] }, "order_id": { "kind": "fk", "ref": "orders.id", "skew": "flat" }, "price_at_purchase": { "kind": "decimal", "min": 0, "max": 17, "scale": 2 }, "quantity": { "kind": "int", "min": 1, "max": 3, "distribution": "long-tail" } } }, "orders": { "description": "Rows for the orders table.", "rows": 450, "columns": { "id": { "kind": "pk" }, "created_at": { "kind": "datetime", "from": "2023-04-01", "to": "2025-12-31" }, "discount_amount": { "kind": "decimal", "min": 0, "max": 25, "scale": 2 }, "final_amount": { "kind": "decimal", "min": 0, "max": 122, "scale": 2 }, "order_status": { "kind": "enum", "values": [ "completed" ] }, "payment_method_id": { "kind": "fk", "ref": "payment_methods.id", "weights": [ 45, 20, 18, 12, 5 ] }, "promotion_id": { "kind": "fk", "ref": "promotions.id", "nullable": true, "nullRate": 0.85 }, "total_amount": { "kind": "decimal", "min": 0, "max": 122, "scale": 2 }, "user_id": { "kind": "fk", "ref": "users.id" } } }, "payment_methods": { "description": "Rows for the payment_methods table.", "rows": 5, "columns": { "id": { "kind": "pk" }, "name": { "kind": "enum", "values": [ "Credit card", "Debit card", "Apple Pay", "Google Pay", "Gift card" ], "unique": true }, "provider": { "kind": "enum", "values": [ "Card", "Gift card", "Wallet" ] } } }, "people": { "description": "Rows for the people table.", "rows": 600, "columns": { "id": { "kind": "pk" }, "biography": { "kind": "enum", "values": [ "Stage actor turned film star", "Began in commercials", "Award-winning character actor", "Former stunt performer", "Known for comedy roles" ] }, "birth_date": { "kind": "date", "from": "1945-01-01", "to": "2008-12-31" }, "birth_place": { "kind": "place.city" }, "first_name": { "kind": "person.firstName" }, "last_name": { "kind": "person.lastName" }, "profile_picture_url": { "kind": "pattern", "pattern": "[https://cdn.example.com/people/]xxxxxxxxxx[.jpg]" } } }, "promotions": { "description": "Rows for the promotions table.", "rows": 8, "columns": { "id": { "kind": "pk" }, "code": { "kind": "enum", "values": [ "MATINEE10", "STUDENT15", "SENIOR15", "TUESDAY20", "FAMILY10", "MEMBER10", "FIRSTFILM25", "BIRTHDAY20" ], "unique": true }, "description": { "kind": "enum", "values": [ "Weekday matinee", "Student discount", "Seniors 65 and over", "Discount Tuesday", "Family of four", "Members", "First booking", "Birthday month" ], "unique": true }, "discount_percentage": { "kind": "decimal", "min": 10, "max": 25, "scale": 2 }, "end_date": { "kind": "date", "from": "2026-01-31", "to": "2026-01-31" }, "start_date": { "kind": "date", "from": "2023-05-01", "to": "2023-05-01" } } }, "reviews": { "description": "Rows for the reviews table.", "rows": 20, "columns": { "id": { "kind": "pk" }, "comment": { "kind": "enum", "values": [ "Loved it", "Better on a big screen", "Too long", "Great soundtrack", "Not for me", "Saw it twice" ], "nullable": true, "nullRate": 0.3 }, "created_at": { "kind": "datetime", "from": "2023-05-01", "to": "2025-12-31" }, "movie_id": { "kind": "fk", "ref": "movies.id" }, "rating": { "kind": "int", "min": 1, "max": 5, "distribution": "high" }, "user_id": { "kind": "fk", "ref": "users.id" } } }, "screens": { "description": "Rows for the screens table.", "rows": 60, "columns": { "id": { "kind": "pk" }, "capacity": { "kind": "int", "min": 0, "max": 400 }, "name": { "kind": "enum", "values": [ "Screen 1", "Screen 2", "Screen 3", "Screen 4", "Screen 5", "Screen 6", "Screen 7", "Screen 8", "Screen 9", "Screen 10", "Screen 11", "Screen 12", "Screen 13", "Screen 14", "Screen 15", "Screen 16", "Screen 17", "Screen 18", "Screen 19", "Screen 20" ] }, "screen_type": { "kind": "enum", "values": [ "Standard", "IMAX", "Dolby Cinema", "ScreenX" ], "weights": [ 75, 10, 10, 5 ] }, "sound_system": { "kind": "enum", "values": [ "Dolby 7.1", "Dolby Atmos", "DTS:X" ], "weights": [ 55, 35, 10 ] }, "theater_id": { "kind": "fk", "ref": "theaters.id", "skew": "flat" } } }, "seat_types": { "description": "Rows for the seat_types table.", "rows": 4, "columns": { "id": { "kind": "pk" }, "base_price_factor": { "kind": "decimal", "min": 1, "max": 1.6, "scale": 2 }, "description": { "kind": "enum", "values": [ "A regular seat", "Best view, middle rows", "Power recliner with footrest", "Wheelchair space with companion seat" ], "unique": true }, "name": { "kind": "enum", "values": [ "Standard", "Premium", "Recliner", "Accessible" ], "unique": true } } }, "seats": { "description": "Rows for the seats table.", "rows": 10800, "columns": { "id": { "kind": "pk" }, "grid_column": { "kind": "int", "min": 1, "max": 400 }, "grid_row": { "kind": "int", "min": 1, "max": 20 }, "number_label": { "kind": "enum", "values": [ "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15", "16", "17", "18" ] }, "row_label": { "kind": "enum", "values": [ "A", "B", "C", "D", "E", "F", "G", "H", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S" ] }, "screen_id": { "kind": "fk", "ref": "screens.id", "skew": "flat" }, "seat_type_id": { "kind": "fk", "ref": "seat_types.id", "weights": [ 70, 15, 12, 3 ] } } }, "shows": { "description": "Rows for the shows table.", "rows": 15, "columns": { "id": { "kind": "pk" }, "audio_language": { "kind": "enum", "values": [ "Original" ] }, "base_ticket_price": { "kind": "decimal", "min": 9, "max": 16, "scale": 2 }, "end_time": { "kind": "datetime", "from": "2023-05-01", "to": "2026-01-31" }, "movie_id": { "kind": "fk", "ref": "movies.id" }, "screen_id": { "kind": "fk", "ref": "screens.id", "skew": "flat" }, "start_time": { "kind": "datetime", "from": "2023-05-01", "to": "2025-12-31", "dayProfile": "waking" }, "subtitle_language": { "kind": "enum", "values": [ "None", "English", "Spanish" ], "weights": [ 80, 12, 8 ] } } }, "theater_facilities": { "description": "Rows for the theater_facilities table.", "rows": 40, "columns": { "id": { "kind": "pk" }, "facility_id": { "kind": "fk", "ref": "facilities.id", "skew": "flat" }, "theater_id": { "kind": "fk", "ref": "theaters.id", "skew": "flat" } } }, "theaters": { "description": "Rows for the theaters table.", "rows": 12, "columns": { "id": { "kind": "pk" }, "address_id": { "kind": "fk", "ref": "addresses.id", "unique": true }, "chain_id": { "kind": "fk", "ref": "chains.id", "skew": "flat" }, "name": { "kind": "enum", "values": [ "Plaza 12", "Riverside 8", "Uptown 10", "Harbor 6", "Grand 14", "Galleria 9", "Westgate 7", "Union Station 5", "Lakefront 8", "Midtown 11", "Northgate 6", "Old Mill 4" ], "unique": true }, "phone": { "kind": "phone.number" } } }, "tickets": { "description": "Rows for the tickets table.", "rows": 1000, "columns": { "id": { "kind": "pk" }, "order_id": { "kind": "fk", "ref": "orders.id", "skew": "flat" }, "price": { "kind": "decimal", "min": 0, "max": 25, "scale": 2 }, "seat_id": { "kind": "fk", "ref": "seats.id" }, "show_id": { "kind": "fk", "ref": "shows.id", "skew": "flat" } } }, "transactions": { "description": "Rows for the transactions table.", "rows": 450, "columns": { "id": { "kind": "pk" }, "amount": { "kind": "decimal", "min": 0, "max": 122, "scale": 2 }, "order_id": { "kind": "fk", "ref": "orders.id", "unique": true }, "processed_at": { "kind": "datetime", "from": "2023-04-01", "to": "2025-12-31" }, "status": { "kind": "enum", "values": [ "succeeded" ] }, "transaction_reference": { "kind": "pattern", "pattern": "[TX-]AAAA########", "unique": true } } }, "user_favorites": { "description": "Rows for the user_favorites table.", "rows": 30, "columns": { "id": { "kind": "pk" }, "movie_id": { "kind": "fk", "ref": "movies.id", "skew": "flat" }, "user_id": { "kind": "fk", "ref": "users.id", "skew": "flat" } } }, "user_refunds": { "description": "Rows for the user_refunds table.", "rows": 10, "columns": { "id": { "kind": "pk" }, "amount": { "kind": "decimal", "min": 0, "max": 31, "scale": 2 }, "order_id": { "kind": "fk", "ref": "orders.id", "unique": true }, "processed_at": { "kind": "datetime", "from": "2023-04-01", "to": "2026-02-28" }, "reason": { "kind": "enum", "values": [ "Show cancelled", "Bought the wrong time", "Could not attend", "Projector fault during the show", "Charged twice" ] }, "requested_at": { "kind": "datetime", "from": "2023-04-01", "to": "2026-01-31" }, "status": { "kind": "enum", "values": [ "processed", "rejected" ], "weights": [ 85, 15 ] } } }, "users": { "description": "Rows for the users table.", "rows": 80, "columns": { "id": { "kind": "pk" }, "created_at": { "kind": "datetime", "from": "2022-01-01", "to": "2025-06-30" }, "email": { "kind": "internet.email", "from": { "firstName": "first_name", "lastName": "last_name" }, "unique": true }, "first_name": { "kind": "person.firstName" }, "last_name": { "kind": "person.lastName" }, "password_hash": { "kind": "pattern", "pattern": "[$2b$12$]xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx" }, "phone": { "kind": "phone.number" } } } } }, "counts": { "chains": 3, "concession_items": 15, "content_ratings": 5, "countries": 1, "cities": 8, "addresses": 12, "facilities": 8, "genres": 10, "movies": 120, "movie_genres": 220, "payment_methods": 5, "people": 600, "movie_crews": 1200, "promotions": 8, "seat_types": 4, "theaters": 12, "screens": 60, "seats": 10800, "shows": 15, "theater_facilities": 40, "users": 80, "device_tokens": 50, "notifications": 50, "orders": 450, "order_concessions": 300, "reviews": 20, "tickets": 1000, "transactions": 450, "user_favorites": 30, "user_refunds": 10 }, "artifacts": [ { "file": 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runs in the build." } ] }, "rules": [ { "name": "A ticket is for a seat on its show's screen, no seat is sold twice for a show, and an order's tickets are all for one show", "violations": 0 }, { "name": "A ticket costs its show's base price times its seat type's factor", "violations": 0 }, { "name": "An order is its tickets and concessions less its promotion's percentage, charged in full by one transaction", "violations": 0 }, { "name": "A film plays from its release for up to eight weeks, and a show runs ten or more minutes longer than its film and at most three hours", "violations": 0 }, { "name": "A ticket is bought ten minutes to two weeks before its show; a refund is at most what was paid and comes after the order", "violations": 0 }, { "name": "A screen's capacity is its seats, numbered 1 to 18 in lettered rows with no seat twice, and each theater names its screens once", "violations": 0 }, { "name": "No theater lists a facility twice, no film a genre twice, and no customer saves a film twice; every theater has screens", "violations": 0 } ] } }, "rules": [ { "name": "A ticket is for a seat on its show's screen, no seat is sold twice for a show, and an order's tickets are all for one show", "sql": "SELECT (SELECT count(*) FROM tickets t JOIN shows s ON s.id = t.show_id JOIN seats se ON se.id = t.seat_id WHERE se.screen_id <> s.screen_id) + (SELECT count(*) - count(DISTINCT (show_id, seat_id)) FROM tickets) + (SELECT count(*) FROM (SELECT order_id FROM tickets GROUP BY order_id HAVING count(DISTINCT show_id) > 1) x) + (SELECT count(*) FROM orders o LEFT JOIN (SELECT DISTINCT order_id FROM tickets) t ON t.order_id = o.id WHERE t.order_id IS NULL) AS violations" }, { "name": "A ticket costs its show's base price times its seat type's factor", "sql": "SELECT count(*) AS violations FROM tickets t JOIN shows s ON s.id = t.show_id JOIN seats se ON se.id = t.seat_id JOIN seat_types st ON st.id = se.seat_type_id WHERE t.price <> round(s.base_ticket_price * st.base_price_factor, 2)" }, { "name": "An order is its tickets and concessions less its promotion's percentage, charged in full by one transaction", "sql": "SELECT (SELECT count(*) FROM orders o LEFT JOIN (SELECT order_id, sum(price) AS tickets FROM tickets GROUP BY order_id) t ON t.order_id = o.id LEFT JOIN (SELECT order_id, sum(quantity * price_at_purchase) AS snacks FROM order_concessions GROUP BY order_id) c ON c.order_id = o.id LEFT JOIN promotions p ON p.id = o.promotion_id WHERE o.total_amount <> coalesce(t.tickets, 0) + coalesce(c.snacks, 0) OR o.discount_amount <> coalesce(round(o.total_amount * p.discount_percentage / 100.0, 2), 0) OR o.final_amount <> o.total_amount - o.discount_amount) + (SELECT count(*) FROM order_concessions oc JOIN concession_items ci ON ci.id = oc.concession_item_id WHERE oc.price_at_purchase <> ci.price) + (SELECT count(*) FROM transactions x JOIN orders o ON o.id = x.order_id WHERE x.amount <> o.final_amount OR x.processed_at <= o.created_at) AS violations" }, { "name": "A film plays from its release for up to eight weeks, and a show runs ten or more minutes longer than its film and at most three hours", "sql": "SELECT count(*) AS violations FROM shows s JOIN movies m ON m.id = s.movie_id WHERE s.start_time::date < m.release_date OR s.start_time::date > m.release_date + 56 OR s.end_time < s.start_time + (m.duration_minutes + 10) * interval '1 minute' OR s.end_time > s.start_time + interval '3 hours'" }, { "name": "A ticket is bought ten minutes to two weeks before its show; a refund is at most what was paid and comes after the order", "sql": "SELECT (SELECT count(*) FROM orders o JOIN (SELECT DISTINCT order_id, show_id FROM tickets) t ON t.order_id = o.id JOIN shows s ON s.id = t.show_id WHERE o.created_at > s.start_time - interval '10 minutes' OR o.created_at < s.start_time - interval '14 days') + (SELECT count(*) FROM user_refunds r JOIN orders o ON o.id = r.order_id WHERE r.amount > o.final_amount OR r.requested_at <= o.created_at OR r.processed_at <= r.requested_at) AS violations" }, { "name": "A screen's capacity is its seats, numbered 1 to 18 in lettered rows with no seat twice, and each theater names its screens once", "sql": "SELECT (SELECT count(*) FROM screens sc LEFT JOIN (SELECT screen_id, count(*) AS seats FROM seats GROUP BY screen_id) s ON s.screen_id = sc.id WHERE sc.capacity <> coalesce(s.seats, 0)) + (SELECT count(*) - count(DISTINCT (screen_id, row_label, number_label)) FROM seats) + (SELECT count(*) - count(DISTINCT (theater_id, name)) FROM screens) + (SELECT count(*) FROM seats WHERE grid_column NOT BETWEEN 1 AND 18) AS violations" }, { "name": "No theater lists a facility twice, no film a genre twice, and no customer saves a film twice; every theater has screens", "sql": "SELECT (SELECT count(*) - count(DISTINCT (theater_id, facility_id)) FROM theater_facilities) + (SELECT count(*) - count(DISTINCT (movie_id, genre_id)) FROM movie_genres) + (SELECT count(*) - count(DISTINCT (user_id, movie_id)) FROM user_favorites) + (SELECT count(*) FROM theaters th LEFT JOIN screens sc ON sc.theater_id = th.id WHERE sc.id IS NULL) AS violations" } ] }, "publishedAt": 1791387005627, "updatedAt": 1791387005627 }