add more examples from courses

authors.sql

@@ -0,0 +1,6 @@
+INSERT INTO authors (author_id, author_name, origin) VALUES
+(1, 'Alexander Pushkin', 'Russia'),
+(2, 'Mark Twain', 'USA'),
+(3, 'Jules Verne', 'France'),
+(4, 'Л.Н. Толстой', 'Russia'),
+(5, 'А.П. Чехов', 'Russia');

books.sql

@@ -0,0 +1,9 @@
+INSERT INTO books (book_id, author_id, title, language, genre, age_rating, users_score) VALUES
+(1, 1, 'Евгений Онегин', 'Russian', 'Роман', '16+', 4.5),
+(2, 1, 'Eugene Onegin', 'English', 'Роман', '16+', 4.6),
+(3, 2, 'Приключения Тома Соера', 'Russian', 'Повесть', '0+', 4.0),
+(4, 2, 'The Adventures of Tom Sawyer', 'English', 'Повесть', '0+', 4.2),
+(5, 3, 'Вокруг света за восемьдесят дней', 'Russian', 'Роман', '12+', 4.5),
+(6, 3, 'Le tour du monde en quatre-vingts jours', 'French', 'Роман', '12+', 5.0),
+(7, 4, 'Анна Каренина', 'Роман', 'Russian', '18+', 4.7),
+(8, 5, 'Война и мир', 'Russian', 'Исторический роман', '12+', 4.3);

departments.sql

@@ -0,0 +1,6 @@
+INSERT INTO departments (department_id, name) VALUES
+(1, 'Development Department'),
+(2, 'Marketing Department'),
+(3, 'Finance Department'),
+(4, 'HR Department'),
+(5, 'Sales Department');

drivers_passengers_rides.sql

@@ -0,0 +1,14 @@
+INSERT INTO drivers (driver_id, driver_name, phone) VALUES
+(1, 'Иванов А.Б.', '+71112223344'),
+(2, 'Петрова В.Г.', '+71113334455');
+
+INSERT INTO passengers (passenger_id, passenger_name, phone) VALUES
+(101, 'Орлов Д.Е.', '+72229998877'),
+(102, 'Соколова Ж.З.', '+72228889900'),
+(103, 'Ястребов И.К.', '+73339995566');
+
+INSERT INTO rides (rideid, driver_id, passenger_id, price) VALUES
+(1001, 1, 101, 567),
+(1002, 1, 102, 234),
+(1003, 2, 103, 1234),
+(1004, 2, 103, 765);

employees.sql

@@ -0,0 +1,7 @@
+INSERT INTO employees (employee_id, department_id, name, salary, position, manager_id) VALUES
+(1, 1, 'John Smith', 50000, 'Programmer', 2),
+(2, 1, 'Peter Johnson',60000, 'Head of development department', 4),
+(3, 2, 'Mary Brown', 55000, 'Programmer', 2),
+(4, 2, 'Alex Miller', 70000, 'Technical Director', NULL),
+(5, 3, 'Helen White', 48000, 'Head of testing department', 4),
+(6, NULL, 'Adam Smith', 10000, 'Tester', 5);

materials_and_colors.sql

@@ -0,0 +1,8 @@
+INSERT INTO materials (material_id, material_name) VALUES
+(100, 'хлопок'),
+(101, 'лен'),
+(102, 'шерсть');
+
+INSERT INTO colors (color_id, color_name) VALUES
+(0, 'красный'),
+(1, 'синий');

orders_and_customers.sql

@@ -0,0 +1,9 @@
+INSERT INTO customers (customer_id, customer_name, email) VALUES
+(1, 'Иванов А.Б.', 'ivanov@email.com'),
+(2, 'Петрова В.Г.', 'petrova@email.com'),
+(3, 'Сидоров Ж.З.', 's_idorov@email.com');
+
+INSERT INTO orders (order_id, customer_id, total_price) VALUES
+(1000, 1, 100),
+(1001, 1, 500),
+(1002, 3, 300);

schema.sql

@@ -45,3 +45,80 @@ CREATE TABLE course_reviews (
   body text,
   created_at timestamp
 );
+
+CREATE TABLE colors (
+    color_id INT PRIMARY KEY,
+    color_name VARCHAR(50)
+);
+
+CREATE TABLE materials (
+    material_id INT PRIMARY KEY,
+    material_name VARCHAR(50)
+);
+
+CREATE TABLE authors (
+    author_id INT PRIMARY KEY,
+    author_name VARCHAR(50),
+    origin VARCHAR(50)
+);
+
+CREATE TABLE books (
+    book_id INT PRIMARY KEY,
+    author_id INT,
+    title VARCHAR(100),
+    language VARCHAR(50),
+    genre VARCHAR(50),
+    age_rating VARCHAR(5),
+    users_score DECIMAL(3, 1)
+);
+
+CREATE TABLE departments (
+    department_id INT PRIMARY KEY,
+    name VARCHAR(50)
+);
+
+
+CREATE TABLE employees (
+    employee_id INT PRIMARY KEY,
+    department_id INT,
+    name VARCHAR(50),
+    salary DECIMAL(10, 2)
+);
+
+CREATE TABLE drivers (
+    driver_id INT PRIMARY KEY,
+    driver_name VARCHAR(50),
+    phone VARCHAR(15)
+);
+
+CREATE TABLE passengers (
+    passenger_id INT PRIMARY KEY,
+    passenger_name VARCHAR(50),
+    phone VARCHAR(15)
+);
+
+CREATE TABLE rides (
+    rideid INT PRIMARY KEY,
+    driver_id INT,
+    passenger_id INT,
+    price DECIMAL(10, 2),
+    FOREIGN KEY (driver_id) REFERENCES drivers(driver_id),
+    FOREIGN KEY (passenger_id) REFERENCES passengers(passenger_id)
+);
+
+CREATE TABLE customers (
+    customer_id INT PRIMARY KEY,
+    customer_name VARCHAR(50),
+    email VARCHAR(50)
+);
+
+CREATE TABLE orders (
+    order_id INT PRIMARY KEY,
+    customer_id INT,
+    total_price DECIMAL(10, 2)
+);
+
+CREATE TABLE employees_with_managers (
+    employee_id INT PRIMARY KEY,
+    employee_name VARCHAR,
+);