[프로그래머스] 12세 이하인 여자 환자 목록 출력하기

SELECT PT_NAME, PT_NO, GEND_CD, AGE, 
IFNULL(TLNO, "NONE") AS TLNO
FROM PATIENT
WHERE AGE <= 12 AND GEND_CD = "W"
ORDER BY AGE DESC, PT_NAME