diff --git a/src/main/resources/migration.sql b/src/main/resources/migration.sql
index 9157905..66dacd5 100644
--- a/src/main/resources/migration.sql
+++ b/src/main/resources/migration.sql
@@ -1,5 +1,6 @@
 PRAGMA foreign_keys = OFF;
 
+DROP TABLE IF EXISTS Users;
 DROP TABLE IF EXISTS Tickets;
 DROP TABLE IF EXISTS Reservations;
 DROP TABLE IF EXISTS Showings;
@@ -9,44 +10,35 @@ DROP TABLE IF EXISTS Theaters;
 PRAGMA foreign_keys = ON;
 
 CREATE TABLE IF NOT EXISTS Users (
-    username VARCHAR(50) PRIMARY KEY,
-    name VARCHAR(100),
+    id INTEGER PRIMARY KEY,
+    username VARCHAR(50),
     address VARCHAR(255),
     telephone VARCHAR(20)
 );
 
 CREATE TABLE IF NOT EXISTS Theaters (
-    theater_id SERIAL PRIMARY KEY,
+    theater_id INTEGER PRIMARY KEY,
     name VARCHAR(100) UNIQUE,
     total_seats INTEGER
 );
 
 CREATE TABLE IF NOT EXISTS Movies (
-    movie_id SERIAL PRIMARY KEY,
+    movie_id INTEGER PRIMARY KEY,
     name VARCHAR(255) UNIQUE
 );
 
 CREATE TABLE IF NOT EXISTS Showings (
-    showing_id SERIAL PRIMARY KEY,
+    showing_id INTEGER PRIMARY KEY,
     movie_id INTEGER REFERENCES Movies(movie_id),
     theater_id INTEGER REFERENCES Theaters(theater_id),
-    show_date DATE,
-    UNIQUE(movie_id, show_date)
+    show_date DATE
 );
 
 CREATE TABLE IF NOT EXISTS Reservations (
-    reservation_id SERIAL PRIMARY KEY,
-    username VARCHAR(50) REFERENCES Users(username),
+    reservation_id INTEGER PRIMARY KEY,
+    username VARCHAR(50) REFERENCES Users(id),
     showing_id INTEGER REFERENCES Showings(showing_id),
-    reservation_number VARCHAR(50),
-    FOREIGN KEY (showing_id, reservation_number) REFERENCES Tickets(showing_id, reservation_number)
-);
-
-CREATE TABLE IF NOT EXISTS Tickets (
-    showing_id INTEGER REFERENCES Showings(showing_id),
-    reservation_number VARCHAR(50),
-    PRIMARY KEY (showing_id, reservation_number),
-    FOREIGN KEY (showing_id, reservation_number) REFERENCES Reservations(showing_id, reservation_number)
+    reservation_number VARCHAR(50) UNIQUE NOT NULL DEFAULT (hex(randomblob(2))) -- 4 characters
 );
 
 INSERT INTO Theaters (name, total_seats) VALUES ('Theater 1', 100);
@@ -56,11 +48,17 @@ INSERT INTO Movies (name) VALUES ('Movie 1');
 INSERT INTO Movies (name) VALUES ('Movie 2');
 INSERT INTO Movies (name) VALUES ('Movie 3');
 
-INSERT INTO Showings (movie_id, theater_id, show_date) VALUES (1, 1, '2021-01-01');
-INSERT INTO Showings (movie_id, theater_id, show_date) VALUES (1, 1, '2021-01-02');
-INSERT INTO Showings (movie_id, theater_id, show_date) VALUES (1, 2, '2021-01-01');
-INSERT INTO Showings (movie_id, theater_id, show_date) VALUES (2, 2, '2021-01-01');
+INSERT INTO Users (username, address, telephone) VALUES ('user1', 'address1', '1234567890');
+INSERT INTO Users (username, address, telephone) VALUES ('user2', 'address2', '1234567890');
+INSERT INTO Users (username, address, telephone) VALUES ('user3', 'address3', '1234567890');
 
-INSERT INTO Users (username, name, address, telephone) VALUES ('user1', 'User 1', 'Address 1', '1234567890');
-INSERT INTO Users (username, name, address, telephone) VALUES ('user2', 'User 2', 'Address 2', '1234567890');
-INSERT INTO Users (username, name, address, telephone) VALUES ('user3', 'User 3', 'Address 3', '1234567890');
\ No newline at end of file
+INSERT INTO Showings (movie_id, theater_id, show_date) VALUES (1, 1, '2024-04-01');
+INSERT INTO Showings (movie_id, theater_id, show_date) VALUES (2, 1, '2024-02-24');
+INSERT INTO Showings (movie_id, theater_id, show_date) VALUES (3, 1, '2024-08-12');
+INSERT INTO Showings (movie_id, theater_id, show_date) VALUES (1, 2, '2024-03-04');
+INSERT INTO Showings (movie_id, theater_id, show_date) VALUES (2, 2, '2024-01-10');
+
+INSERT INTO Reservations (username, showing_id) VALUES (1, 1);
+INSERT INTO Reservations (username, showing_id) VALUES (2, 2);
+INSERT INTO Reservations (username, showing_id) VALUES (3, 3);
+INSERT INTO Reservations (username, showing_id) VALUES (1, 4);
\ No newline at end of file