[프로그래머스/SQL 고득점 Kit/MySQL] SUM, MAX, MIN

https://school.programmers.co.kr/learn/challenges?tab=sql_practice_kit 

프로그래머스

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<SUM, MAX, MIN>
Q.가격이 제일 비싼 식품의 정보 출력하기

SELECT PRODUCT_ID, PRODUCT_NAME, PRODUCT_CD, CATEGORY, PRICE
FROM FOOD_PRODUCT 
ORDER BY PRICE DESC 
LIMIT 1

Q.가장 비싼 상품 구하기

SELECT MAX(PRICE) as MAX_PRICE
FROM PRODUCT

Q.최댓값 구하기

SELECT MAX(DATETIME) as 시간
FROM ANIMAL_INS 
/*
SELECT DATETIME as 시간
FROM ANIMAL_INS 
ORDER BY DATETIME DESC
LIMIT 1
*/

Q.최솟값 구하기

SELECT MIN(DATETIME) AS 시간
FROM ANIMAL_INS

Q.동물 수 구하기

SELECT count(*) as count
FROM ANIMAL_INS

Q.중복 제거하기

SELECT COUNT(DISTINCT NAME)
FROM ANIMAL_INS 
WHERE NAME is not null