SQL: DDL команды (CREATE, ALTER, DROP)

-- SQL: DDL команды (CREATE, ALTER, DROP) -- CREATE TABLE CREATE TABLE users ( id INT PRIMARY KEY AUTO_INCREMENT, name VARCHAR(255) NOT NULL, email VARCHAR(255) UNIQUE, age INT, created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ); CREATE TABLE orders ( id INT PRIMARY KEY AUTO_INCREMENT, user_id INT NOT NULL, total DECIMAL(10, 2), status VARCHAR(50) DEFAULT 'pending', FOREIGN KEY (user_id) REFERENCES users(id) ); --…