샘플데이터 user1
CREATE TABLE users (id SERIAL PRIMARY KEY,username VARCHAR(50) NOT NULL,email VARCHAR(100) NOT NULL,full_name VARCHAR(100),age INTEGER,city VARCHAR(50),created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP); CREATE INDEX idx_users_email ON users(email);CREATE INDEX idx_users_city ON users(city); INSERT INTO users (username, email, full_name, age, city) VALUES('john_doe', 'john.doe@email.com', 'John Doe..
2025. 6. 9.