Initial commit

migrations/down.sql

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+-- This file should undo anything in `up.sql`
+DROP TABLE products;
+DROP TABLE orders_products;
+DROP TABLE orders;
+DROP VIEW totals_per_owner_and_order;

migrations/up.sql

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+-- Your SQL goes here
+CREATE TABLE products (
+       id INTEGER PRIMARY KEY NOT NULL,
+       name TEXT UNIQUE NOT NULL,
+       price REAL NOT NULL,
+       owner TEXT NOT NULL,
+       created_at TEXT DEFAULT CURRENT_TIMESTAMP NOT NULL,
+       updated_at TEXT DEFAULT CURRENT_TIMESTAMP NOT NULL
+);
+
+CREATE TABLE orders (
+       id INTEGER PRIMARY KEY NOT NULL,
+       created_at TEXT DEFAULT CURRENT_TIMESTAMP NOT NULL,
+       updated_at TEXT DEFAULT CURRENT_TIMESTAMP NOT NULL
+);
+
+CREATE TABLE orders_products (
+       order_id INTEGER NOT NULL,
+       product_id INTEGER NOT NULL,
+       quantity INTEGER NOT NULL,
+       FOREIGN KEY (order_id) REFERENCES orders(id),
+       FOREIGN KEY (product_id) REFERENCES products(id),
+       PRIMARY KEY (order_id, product_id)
+);
+
+INSERT INTO products (name, price, owner)
+VALUES
+	("Pfadiburger", 5.1, "Pfadfinder"),
+	("Kuchen", 2, "Sportunion"),
+	("Apfelsaft", 1.5, "Sportunion"),
+	("Käsekrainer", 4, "Pfadfinder"),
+	("Süßes", 0.2, "Pfadfinder"),
+	("Capuccino", 3.5, "Deluke"),
+	("Espresso", 2.5, "Deluke");
+
+INSERT INTO orders DEFAULT VALUES;
+INSERT INTO orders_products (order_id, product_id, quantity)
+VALUES
+	(1, 1, 3),
+	(1, 2, 1),
+	(1, 5, 1);
+
+INSERT INTO orders DEFAULT VALUES;
+INSERT INTO orders_products (order_id, product_id, quantity)
+VALUES
+	(2, 4, 2),
+	(2, 6, 2),
+	(2, 2, 1);
+
+CREATE VIEW totals_per_owner_and_order AS
+SELECT id, owner, SUM(total_price) AS total FROM (
+    SELECT o.id, p.owner, p.price*op.quantity AS total_price FROM orders AS o
+    INNER JOIN orders_products AS op ON o.id = op.order_id
+    INNER JOIN products AS p ON p.id = op.product_id
+  )
+GROUP BY id, owner;