CREATE TABLE businesses (
    id INT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(150) NOT NULL,
    currency VARCHAR(3) NOT NULL DEFAULT 'NGN',
    created_by INT UNSIGNED NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
    CONSTRAINT fk_businesses_creator FOREIGN KEY (created_by) REFERENCES users(id) ON DELETE RESTRICT
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;