문제
https://school.programmers.co.kr/learn/courses/30/lessons/59408
코드
SELECT COUNT(DISTINCT NAME) AS count FROM ANIMAL_INS WHERE NAME IS NOT NULL;
문제
https://school.programmers.co.kr/learn/courses/30/lessons/59408
코드
SELECT COUNT(DISTINCT NAME) AS count FROM ANIMAL_INS WHERE NAME IS NOT NULL;