CREATE TABLE IF NOT EXISTS clients (
  id                INT AUTO_INCREMENT PRIMARY KEY,
  name              VARCHAR(150)  NOT NULL,
  identification_no VARCHAR(50)   NOT NULL UNIQUE,
  date_of_birth     DATE          NULL,
  address           TEXT          NULL,
  phone             VARCHAR(20)   NULL,
  email             VARCHAR(150)  NULL,
  issued_date       DATE          NULL,
  maturity_date     DATE          NULL,
  plan_code_id      INT           NULL,
  payment_mode_id   INT           NULL,
  payment_method_id INT           NULL,
  premium_due_date  DATE          NULL,
  status_id         INT           NULL,
  policy_no         VARCHAR(100)  NULL,
  total_premium     DECIMAL(12,2) NULL,
  created_by        INT           NULL,
  created_at        TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
  updated_at        TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  FOREIGN KEY (created_by) REFERENCES users(id) ON DELETE SET NULL
);