Initial commit

core/sql/cinema_db_create_tables.sql

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+-- Create table "Genres" to store movie genres
+
+CREATE TABLE genres (
+    genre_id INTEGER PRIMARY KEY AUTOINCREMENT,
+    genre_name TEXT NOT NULL UNIQUE CHECK(length(genre_name) > 0), -- Genre name cannot be empty
+    CONSTRAINT no_double_spaces_in_genre_name CHECK (genre_name NOT LIKE '%  %') -- Genre name cannot contain double spaces
+);
+
+-- Create table "Movies" to store movie details
+
+CREATE TABLE movies (
+    movie_id INTEGER PRIMARY KEY AUTOINCREMENT,
+    title TEXT NOT NULL UNIQUE CHECK(length(title) > 0), -- Movie title cannot be empty
+    genre_id INTEGER,
+    duration INTEGER CHECK(duration > 0), -- Movie duration must be greater than 0
+    FOREIGN KEY (genre_id) REFERENCES genres (genre_id) ON DELETE CASCADE,
+    CONSTRAINT no_double_spaces_in_title CHECK (title NOT LIKE '%  %') -- Movie title cannot contain double spaces
+);
+
+-- Create table "Halls" to store cinema hall details
+
+CREATE TABLE halls (
+    hall_id INTEGER PRIMARY KEY AUTOINCREMENT,
+    hall_name TEXT NOT NULL UNIQUE CHECK(length(hall_name) > 0), -- Hall name cannot be empty
+    capacity INTEGER NOT NULL CHECK(capacity > 0), -- Hall capacity must be positive
+    CONSTRAINT no_double_spaces_in_hall_name CHECK (hall_name NOT LIKE '%  %') -- Hall name cannot contain double spaces
+);
+
+-- Create table "Sessions" to store session details
+
+CREATE TABLE sessions (
+    session_id INTEGER PRIMARY KEY AUTOINCREMENT,
+    movie_id INTEGER,
+    hall_id INTEGER,
+    begin_at TIMESTAMP NOT NULL, -- Date and time of the session
+    ticket_price REAL NOT NULL CHECK(ticket_price >= 0), -- Ticket price cannot be negative
+    FOREIGN KEY (movie_id) REFERENCES movies (movie_id) ON DELETE CASCADE,
+    FOREIGN KEY (hall_id) REFERENCES halls (hall_id) ON DELETE CASCADE,
+    CONSTRAINT unique_hall_time UNIQUE (hall_id, begin_at) -- Prevent duplicate sessions in the same hall at the same time
+);
+
+-- Create table "Tickets" to store sold tickets
+
+CREATE TABLE tickets (
+    ticket_id INTEGER PRIMARY KEY AUTOINCREMENT,
+    session_id INTEGER,
+    seat_number INTEGER NOT NULL CHECK(seat_number > 0), -- Seat number must be positive
+    sold_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP, -- Sale time defaults to current time
+    FOREIGN KEY (session_id) REFERENCES sessions (session_id) ON DELETE CASCADE,
+    CONSTRAINT unique_session_seat UNIQUE(session_id, seat_number) -- Unique combination of session and seat number
+);
+
+-- Create table "Refunds" to store refunded tickets
+
+CREATE TABLE refunds (
+    refund_id INTEGER PRIMARY KEY AUTOINCREMENT,
+    ticket_id INTEGER NOT NULL UNIQUE,
+    refund_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    refund_amount REAL NOT NULL CHECK (refund_amount >= 0), -- Refund amount cannot be negative
+    FOREIGN KEY (ticket_id) REFERENCES tickets(ticket_id) ON DELETE CASCADE
+);
+
+-- Create table "Roles" to store user roles
+
+CREATE TABLE roles (
+    role_id INTEGER PRIMARY KEY AUTOINCREMENT,
+    role_name TEXT UNIQUE NOT NULL CHECK(length(role_name) > 0), -- Role name cannot be empty
+    access_level INTEGER UNIQUE NOT NULL CHECK(access_level > 0), -- Access level must be positive
+    CONSTRAINT no_spaces_in_role_name CHECK (role_name NOT LIKE '% %') -- Role name cannot contain spaces
+);
+
+-- Create table "Users" to store user details
+
+CREATE TABLE users (
+    user_id INTEGER PRIMARY KEY AUTOINCREMENT,
+    username TEXT UNIQUE NOT NULL CHECK(length(username) > 0), -- Username cannot be empty
+    password_hash TEXT NOT NULL CHECK(length(password_hash) > 0), -- Password hash cannot be empty
+    salt TEXT UNIQUE NOT NULL CHECK(length(salt) > 0), -- Salt cannot be empty
+    role_id INTEGER NOT NULL,
+    FOREIGN KEY (role_id) REFERENCES roles(role_id) ON DELETE CASCADE,
+    CONSTRAINT no_spaces_in_username CHECK (username NOT LIKE '% %') -- Username cannot contain spaces
+);
+