CREATE TABLE user (
    id INT AUTO_INCREMENT PRIMARY KEY,
    nickname VARCHAR(50) NOT NULL,
    phone_number VARCHAR(15) NOT NULL UNIQUE,
    password VARCHAR(255) NOT NULL,
    identity ENUM('teacher', 'student') NOT NULL,
    is_active BOOLEAN NOT NULL
);

INSERT INTO user (nickname, phone_number, password, identity, is_active) VALUES
('Alice', '10000000001', 'password1', 'student', TRUE),
('Bob', '10000000002', 'password2', 'teacher', TRUE),
('Carol', '10000000003', 'password3', 'student', FALSE),
('David', '10000000004', 'password4', 'teacher', TRUE),
('Eve', '10000000005', 'password5', 'student', TRUE),
('Frank', '10000000006', 'password6', 'teacher', FALSE),
('Grace', '10000000007', 'password7', 'student', TRUE),
('Hank', '10000000008', 'password8', 'teacher', TRUE),
('Ivy', '10000000009', 'password9', 'student', FALSE),
('Jack', '10000000010', 'password10', 'teacher', TRUE);