CREATE TABLE IF NOT EXISTS spk_number_counters (
  id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT,
  location_id BIGINT UNSIGNED NOT NULL,
  spk_date DATE NOT NULL,
  last_seq INT UNSIGNED NOT NULL DEFAULT 0,
  created_at TIMESTAMP NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at TIMESTAMP NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (id),
  UNIQUE KEY uq_spk_counter_location_date (location_id, spk_date),
  CONSTRAINT fk_spk_counter_location FOREIGN KEY (location_id) REFERENCES locations(id)
    ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;