MySQL 전화번호 문자열 분리 (SUBSTRING_INDEX)

SELECT
  SUBSTRING_INDEX('010-1234-5678','-',1) AS tel1,
  SUBSTRING_INDEX(SUBSTRING_INDEX('010-1234-5678','-',-2),'-',1) AS tel2,
  SUBSTRING_INDEX('010-1234-5678','-',-1) AS tel3;
-- → 010 / 1234 / 5678