CODING 05

강원도에 위치한 생산공장 목록 출력하기

https://school.programmers.co.kr/learn/courses/30/lessons/131112

SELECT FACTORY_ID, FACTORY_NAME, ADDRESS

FROM FOOD_FACTORY

WHERE ADDRESS LIKE '%강원도%'

ORDER BY FACTORY_ID ASC

 

이름이 없는 동물의 아이디

https://school.programmers.co.kr/learn/courses/30/lessons/59039

SELECT ANIMAL_ID

FROM ANIMAL_INS

WHERE NAME IS NULL

ORDER BY ANIMAL_ID ASC

 

조건에 맞는 회원수 구하기

https://school.programmers.co.kr/learn/courses/30/lessons/131535

 

SELECT COUNT( USER_ID ) AS USERS

FROM USER_INFO

WHERE YEAR(JOINED) = '2021' AND AGE BETWEEN 20 AND 29 ;

SELECT COUNT(USER_ID) AS USERS

FROM USER_INFO

WHERE YEAR(JOINED) = 2021 AND AGE BETWEEN 20 AND 29 ;

SELECT COUNT(USER_ID) AS USERS

FROM USER_INFO

WHERE YEAR(JOINED) = 2021 AND (AGE BETWEEN 20 AND 29) ;

SELECT COUNT( USER_ID ) AS USERS

FROM USER_INFO

WHERE (JOINED BETWEEN '2021-01-01' AND '2021-12-31') AND (AGE BETWEEN 20 AND 29) ;