https://programmers.co.kr/learn/courses/30/lessons/59041
์ฝ๋ฉํ ์คํธ ์ฐ์ต - ๋๋ช ๋๋ฌผ ์ ์ฐพ๊ธฐ
ANIMAL_INS ํ ์ด๋ธ์ ๋๋ฌผ ๋ณดํธ์์ ๋ค์ด์จ ๋๋ฌผ์ ์ ๋ณด๋ฅผ ๋ด์ ํ ์ด๋ธ์ ๋๋ค. ANIMAL_INS ํ ์ด๋ธ ๊ตฌ์กฐ๋ ๋ค์๊ณผ ๊ฐ์ผ๋ฉฐ, ANIMAL_ID, ANIMAL_TYPE, DATETIME, INTAKE_CONDITION, NAME, SEX_UPON_INTAKE๋ ๊ฐ๊ฐ ๋๋ฌผ์ ์์ด๋
programmers.co.kr
ํ์ด
SELECT NAME, COUNT(NAME)
FROM ANIMAL_INS
GROUP BY NAME
HAVING COUNT(NAME) >= 2 AND NAME IS NOT NULL
ORDER BY NAME'๐๏ธ Algorithm > โฌ ํ๋ก๊ทธ๋๋จธ์ค' ์นดํ ๊ณ ๋ฆฌ์ ๋ค๋ฅธ ๊ธ
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