SQL - definicja bazy sklep

PC24-SklepWeb/sql/sklep_create.sql

+DROP TABLE IF EXISTS order_products;
+DROP TABLE IF EXISTS orders;
+DROP TABLE IF EXISTS customers;
+DROP TABLE IF EXISTS products;
+DROP SEQUENCE IF EXISTS products_seq;
+DROP SEQUENCE IF EXISTS orders_seq;
+DROP TYPE IF EXISTS order_status;
+
+
+CREATE SEQUENCE products_seq START 10;
+CREATE SEQUENCE orders_seq START 10;
+
+CREATE TABLE products
+(
+    product_id   INTEGER DEFAULT nextval('products_seq'),
+    product_name VARCHAR(100)   NOT NULL,
+    -- 10 cyfr, z czego 2 po prawej stronie kropki
+    -- zakres wartości od -99999999.99 do +99999999.99
+    -- inna nazwa: DECIMAL, w Oraclu nazwa NUMBER
+    price        NUMERIC(10, 2) NOT NULL,
+    vat          NUMERIC(2, 2), -- wartości do 0.99
+    description  TEXT,          -- w Oraclu pod nazwą CLOB
+
+    PRIMARY KEY (product_id),
+    CHECK (price > 0),
+    CHECK (vat >= 0),
+    CHECK (length(product_name) > 0)
+);
+
+-- Nie zawsze kluczem głównym jest automatycznie generowany numer.
+-- Kluczem może być też kolumna tekstowa, albo typu "data z czasem" (timestamp).
+-- Przykładowo tutaj napiszemy, że kluczem klienta jest jego email.
+CREATE TABLE customers
+(
+    customer_email VARCHAR(100),
+    customer_name  VARCHAR(100) NOT NULL,
+    phone_number   VARCHAR(20),
+    address        VARCHAR(250),
+    postal_code    VARCHAR(10),
+    city           VARCHAR(100),
+
+    PRIMARY KEY (customer_email)
+);
+
+CREATE TYPE order_status AS ENUM (
+    'NEW',
+    'CONFIRMED',
+    'PAID',
+    'SHIPPED',
+    'DELIVERED',
+    'CLOSED',
+    'RETURNED'
+);
+
+CREATE TABLE orders
+(
+    order_id       INTEGER      DEFAULT nextval('orders_seq'),
+    customer_email VARCHAR(100)                           NOT NULL,
+    status         order_status DEFAULT 'NEW'             NOT NULL,
+    order_date     TIMESTAMP    DEFAULT current_timestamp NOT NULL,
+    delivery_date  DATE,
+
+    PRIMARY KEY (order_id),
+    FOREIGN KEY (customer_email) REFERENCES customers (customer_email),
+    -- kolumna customer_email z tej tabeli wskazuje na kolumnę customer_email z tabeli customers
+    -- (można wpisać tylko email istniejącego klienta)
+    CHECK (delivery_date >= order_date:: DATE
+)
+    );
+
+CREATE TABLE order_products
+(
+    order_id     INTEGER            NOT NULL,
+    product_id   INTEGER            NOT NULL,
+    quantity     SMALLINT DEFAULT 1 NOT NULL,
+    actual_price NUMERIC(10, 2)     NOT NULL,
+    actual_vat   NUMERIC(2, 2),
+
+    PRIMARY KEY (order_id, product_id),
+    FOREIGN KEY (order_id) REFERENCES orders (order_id),
+    FOREIGN KEY (product_id) REFERENCES products (product_id)
+);
+
+
+
+

PC24-SklepWeb/sql/sklep_insert.sql

+
+INSERT INTO products(product_id, product_name, price, vat, description)
+    VALUES (1, 'pralka', 2900.00, 0.23, 'Pralka szybkoobrotowa');
+
+INSERT INTO products(product_id, product_name, price, vat, description)
+    VALUES (2, 'odkurzacz', 800.00, 0.23, 'Odkurzacz automatyczny');
+
+INSERT INTO products(product_id, product_name, price, vat, description)
+    VALUES (3, 'telewizor 55"', 3300.00, 0.23, 'Telewizor 55 cali 4K');
+
+INSERT INTO products(product_id, product_name, price, vat, description)
+    VALUES (4, 'telewizor 40"', 2200.00, 0.23, 'Telewizor 40 Full HD');
+
+INSERT INTO products(product_id, product_name, price, vat)
+    VALUES (5, 'myszka gejmerska', 444.00, 0.23);
+
+    
+INSERT INTO customers(customer_email, phone_number, customer_name, address, postal_code, city)
+    VALUES ('ala@example.com', '123123123', 'Ala Kowalska', 'Jasna 14/16', '01-234', 'Warszawa');
+
+INSERT INTO customers(customer_email, phone_number, customer_name, address, postal_code, city)
+    VALUES ('ola@example.com', '321321321', 'Ola Malinowska', 'Ciemna 133', '99-999', 'Pcim');
+
+
+INSERT INTO orders(order_id, customer_email, order_date, status)
+    VALUES (1, 'ala@example.com', '2021-11-20 12:30:00', 'PAID');
+
+INSERT INTO orders(order_id, customer_email, order_date, status, delivery_date)
+    VALUES (2, 'ola@example.com', '2021-11-18 10:00:00', 'SHIPPED', '2021-12-01');
+
+INSERT INTO orders(order_id, customer_email)
+    VALUES (3, 'ala@example.com');
+
+
+INSERT INTO order_products(order_id, product_id, quantity, actual_price, actual_vat)
+    VALUES (1, 1, 1, 2900.00, 0.23);
+INSERT INTO order_products(order_id, product_id, quantity, actual_price, actual_vat)
+    VALUES (1, 2, 3, 2400.00, 0.23);
+INSERT INTO order_products(order_id, product_id, quantity, actual_price, actual_vat)
+    VALUES (2, 2, 1, 800.00, 0.23);
+INSERT INTO order_products(order_id, product_id, quantity, actual_price, actual_vat)
+    VALUES (3, 4, 1, 2200.00, 0.23);
+INSERT INTO order_products(order_id, product_id, quantity, actual_price, actual_vat)
+    VALUES (3, 3, 1, 300.00, 0.23);
+INSERT INTO order_products(order_id, product_id, quantity, actual_price, actual_vat)
+    VALUES (3, 5, 1, 1000.00, 0.23);
+
+-- SELECT * FROM products;
+
+-- SELECT * FROM orders FULL JOIN customers USING(customer_email);
+
+-- SELECT * FROM orders LEFT JOIN customers USING(customer_email) LEFT JOIN order_products USING(order_id) LEFT JOIN products USING(product_id) ORDER BY order_id, product_id;