From d00110c7ae5afe08915f7aff8be0d6fc7b943ee5 Mon Sep 17 00:00:00 2001
From: pavel <pmkhlv@gmail.com>
Date: Wed, 11 Feb 2026 18:54:44 +0100
Subject: [PATCH] ddl, dml tasks done

---
 pmikhailov/postgresql/.project    | 11 +++++
 pmikhailov/postgresql/DDL-DML.sql | 80 +++++++++++++++++++++++++++++++
 2 files changed, 91 insertions(+)
 create mode 100644 pmikhailov/postgresql/.project
 create mode 100644 pmikhailov/postgresql/DDL-DML.sql

diff --git a/pmikhailov/postgresql/.project b/pmikhailov/postgresql/.project
new file mode 100644
index 0000000..92f941b
--- /dev/null
+++ b/pmikhailov/postgresql/.project
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>postgresql</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+	</buildSpec>
+	<natures>
+	</natures>
+</projectDescription>
diff --git a/pmikhailov/postgresql/DDL-DML.sql b/pmikhailov/postgresql/DDL-DML.sql
new file mode 100644
index 0000000..afeb254
--- /dev/null
+++ b/pmikhailov/postgresql/DDL-DML.sql
@@ -0,0 +1,80 @@
+CREATE TABLE users (
+	id int PRIMARY KEY, -- NOT NULL
+	"name" varchar(100) NOT NULL,
+	age int,
+	email varchar(100),
+	country varchar(2),
+	is_active boolean,
+	created_at timestamptz NOT NULL
+);
+	
+CREATE TABLE products (
+	id int PRIMARY KEY, 
+	"name" varchar(100) NOT NULL,
+	category varchar(50),
+	price decimal(10,2) NOT NULL,
+	in_stock BOOLEAN -- или int, потому что или на складе или не на складе
+); 
+	
+CREATE TABLE orders (
+	id int PRIMARY KEY,
+	user_id int, 
+	order_date timestamptz NOT NULL,
+	status varchar(20)
+);
+
+CREATE TABLE order_items (
+	order_id int,
+	product_id int,
+	quantity int NOT NULL,
+	price_at_purchase decimal(10,2) NOT NULL,
+	PRIMARY KEY (order_id, product_id)
+);
+
+INSERT INTO pmikhailov.users
+(id, "name", age, email, country, is_active, created_at) VALUES
+(1, 'Alice', 25, 'alice@example.com', 'US', TRUE, '2024-01-10 10:00:00'),
+(2, 'Bob', 30, 'bob@example.com', 'UK', TRUE, '2024-02-05 09:30:00'),
+(3, 'Carol', 27, 'carol@example.com', 'US', FALSE, '2024-03-01 15:20:00'),
+(4, 'Diana', 22, 'diana@gmail.com', 'US', TRUE, '2024-01-12 08:15:00'),
+(5, 'Evan', 35, 'evan@example.com', 'UK', TRUE, '2024-01-18 19:40:00'),
+(6, 'Farida', 29, 'farida@example.com', 'KZ', TRUE, '2024-02-20 11:05:00'),
+(7, 'George', 31, 'george+test@example.com', 'US', TRUE, '2024-03-05 16:45:00'),
+(8, 'Helen', 24, NULL, 'UK', FALSE, '2024-03-06 08:20:00'),
+(9, 'Ivan', 26, 'ivan@example.com', 'RU', TRUE, '2024-01-11 14:30:00'),
+(10, 'Julia', 28, 'julia@example.com', 'US', TRUE, '2024-03-07 18:05:00');
+
+
+INSERT INTO pmikhailov.products
+(id, "name", category, price, in_stock) VALUES
+(1, 'iPhone 15', 'Электроника', 80000, TRUE),
+(2, 'Kindle', 'Электроника', 15000, TRUE),
+(3, 'Кроссовки Nike', 'Одежда', 9000, TRUE),
+(4, 'Кроссовки NoName', 'Одежда', 3000, FALSE),
+(5, 'Наушники Pro', 'Электроника', 12000, TRUE),
+(6, 'Фитнес-браслет', 'Гаджеты', 6000, TRUE),
+(7, 'Подарочная карта', 'Сервисы', 1000, TRUE);
+
+INSERT INTO pmikhailov.orders
+(id, user_id, order_date, status) VALUES
+(1, 1, '2025-01-10 12:00:00', 'paid'),
+(2, 3, '2025-01-12 09:30:00', 'cancelled'),
+(3, 1, '2025-01-15 18:20:00', 'paid'),
+(4, 2, '2025-01-20 11:05:00', 'created'),
+(5, 4, '2025-02-01 17:45:00', 'paid'),
+(6, 5, '2025-02-10 10:10:00', 'refunded'),
+(7, 7, '2025-03-01 09:00:00', 'paid'),
+(8, 9, '2025-03-05 19:30:00', 'paid');
+
+INSERT INTO pmikhailov.order_items
+(order_id, product_id, quantity, price_at_purchase) VALUES
+(1, 1, 1, 78000),
+(1, 3, 2, 8500),
+(2, 2, 1, 14000),
+(3, 5, 1, 11000),
+(3, 7, 1, 1000),
+(4, 2, 1, 15000),
+(5, 6, 1, 6000),
+(6, 1, 1, 82000),
+(7, 3, 1, 9000),
+(8, 4, 2, 2800);