ror_coding

Question ONLINE_SALE 테이블과 OFFLINE_SALE 테이블에서 2022년 3월의 오프라인/온라인 상품 판매 데이터의 판매 날짜, 상품ID, 유저ID, 판매량을 출력하는 SQL문을 작성해주세요. OFFLINE_SALE 테이블의 판매 데이터의 USER_ID 값은 NULL 로 표시해주세요. 결과는 판매일을 기준으로 오름차순 정렬해주시고 판매일이 같다면 상품 ID를 기준으로 오름차순, 상품ID까지 같다면 유저 ID를 기준으로 오름차순 정렬해주세요.  Code SELECT DATE_FORMAT(SALES_DATE,'%Y-%m-%d') SALES_DATE, PRODUCT_ID, USER_ID, SALES_AMOUNTFROM ONLINE_SALEWHERE ..

Question HR_DEPARTMENT, HR_EMPLOYEES, HR_GRADE 테이블을 이용해 사원별 성과금 정보를 조회하려합니다. 평가 점수별 등급과 등급에 따른 성과금 정보가 아래와 같을 때, 사번, 성명, 평가 등급, 성과금을 조회하는 SQL문을 작성해주세요. 평가등급의 컬럼명은 GRADE로, 성과금의 컬럼명은 BONUS로 해주세요. 결과는 사번 기준으로 오름차순 정렬해주세요.  Code SELECT E.EMP_NO, EMP_NAME, GRADE, CASE WHEN GRADE = 'S' THEN SAL*0.2 WHEN GRADE = 'A' THEN SAL*0.15 WHEN GRADE = 'B' THEN SAL*0.1 ..

게시물 가장 많은 아이디 추출을 위해 JOIN (SELECT~)를 해주고 자기 자신과 SELF JOIN 해줬다. Question MEMBER_PROFILE와 REST_REVIEW 테이블에서 리뷰를 가장 많이 작성한 회원의 리뷰들을 조회하는 SQL문을 작성해주세요. 회원 이름, 리뷰 텍스트, 리뷰 작성일이 출력되도록 작성해주시고, 결과는 리뷰 작성일을 기준으로 오름차순, 리뷰 작성일이 같다면 리뷰 텍스트를 기준으로 오름차순 정렬해주세요. Code (After) WITH MOST_MEMBER AS( SELECT MEMBER_ID, COUNT(*) # SELECT MEMBER_ID FROM REST_REVIEW GROUP BY MEMBER_ID ORDER BY 2 D..

ORDER BY 절에서 F.total + SUM(J.total) 연산이 가능하다. Question 7월 아이스크림 총 주문량과 상반기의 아이스크림 총 주문량을 더한 값이 큰 순서대로 상위 3개의 맛을 조회하는 SQL 문을 작성해주세요.  Code SELECT F.FLAVOR FROM FIRST_HALF F JOIN JULY J ON F.FLAVOR = J.FLAVOR GROUP BY F.FLAVOR ORDER BY (F.TOTAL_ORDER + SUM(J.TOTAL_ORDER)) DESC LIMIT 3 now meOn my github

Question 데이터 분석 팀에서는 우유(Milk)와 요거트(Yogurt)를 동시에 구입한 장바구니가 있는지 알아보려 합니다. 우유와 요거트를 동시에 구입한 장바구니의 아이디를 조회하는 SQL 문을 작성해주세요. 이때 결과는 장바구니의 아이디 순으로 나와야 합니다. Code (After) SELECT CART_ID FROM CART_PRODUCTS WHERE NAME REGEXP 'Milk|Yogurt' GROUP BY CART_ID HAVING COUNT(DISTINCT NAME) >= 2 ORDER BY 1 Code (Before) SELECT CART_ID FROM (SELECT CART_ID FROM CART_PRODUCTS ..

Question 2022년 1월의 도서 판매 데이터를 기준으로 저자 별, 카테고리 별 매출액(TOTAL_SALES = 판매량 * 판매가) 을 구하여, 저자 ID(AUTHOR_ID), 저자명(AUTHOR_NAME), 카테고리(CATEGORY), 매출액(SALES) 리스트를 출력하는 SQL문을 작성해주세요. 결과는 저자 ID를 오름차순으로, 저자 ID가 같다면 카테고리를 내림차순 정렬해주세요.  Code SELECT A.AUTHOR_ID, AUTHOR_NAME, CATEGORY, SUM(PRICE*SALES) AS TOTAL_SALES FROM BOOK B JOIN AUTHOR A ON B.AUTHOR_ID = A.AUTHOR_ID JOIN BOOK_SALES S ON B...

Question USER_INFO 테이블과 ONLINE_SALE 테이블에서 년, 월, 성별 별로 상품을 구매한 회원수를 집계하는 SQL문을 작성해주세요. 결과는 년, 월, 성별을 기준으로 오름차순 정렬해주세요. 이때, 성별 정보가 없는 경우 결과에서 제외해주세요.  Code SELECT YEAR(SALES_DATE) AS YEAR, MONTH(SALES_DATE) AS MONTH, GENDER, COUNT(DISTINCT(U.USER_ID)) AS USERS FROM USER_INFO U JOIN ONLINE_SALE S ON U.USER_ID = S.USER_ID WHERE GENDER IS NOT NULL GROUP BY YEAR, MONTH, GENDER ORDE..

Question REST_INFO와 REST_REVIEW 테이블에서 서울에 위치한 식당들의 식당 ID, 식당 이름, 음식 종류, 즐겨찾기수, 주소, 리뷰 평균 점수를 조회하는 SQL문을 작성해주세요. 이때 리뷰 평균점수는 소수점 세 번째 자리에서 반올림 해주시고 결과는 평균점수를 기준으로 내림차순 정렬해주시고, 평균점수가 같다면 즐겨찾기수를 기준으로 내림차순 정렬해주세요.  Code SELECT I.REST_ID, REST_NAME, FOOD_TYPE, FAVORITES, ADDRESS, ROUND(AVG(REVIEW_SCORE),2) AS SCORE FROM REST_INFO I JOIN REST_REVIEW R ON I.REST_ID = R.REST_ID WHERE ADDRE..