Created tables users, products, orders, order_items.

aharlamcev/postgresql/homeworkDDL.sql

@@ -0,0 +1,32 @@
+create table users (
+id int primary key,
+name VARCHAR(100) not null,
+email VARCHAR(100),
+country VARCHAR(50),
+crated_at date not null
+) ;
+
+create table products (
+id int primary key,
+name VARCHAR(100) not null,
+category VARCHAR(50),
+price DECIMAL(10, 2),
+in_stock BOOLEAN default true
+) ;
+
+create table orders (
+id int primary key,
+user_id int,
+order_date DATE not null,
+status VARCHAR(20),
+foreign key (user_id) references users(id)
+) ;
+
+create table order_items (
+order_id int,
+product_id int,
+quantity int not null,
+price_at_purchase DECIMAL(10, 2) not null,
+foreign key (order_id) references orders(id),
+foreign key (product_id) references products(id)
+) ;