D23

K_ule/2023.03.27-L3-5

@@ -0,0 +1,20 @@
+1번 : 조건에 맞는 사용자 정보 조회하기
+SELECT USER_ID,NICKNAME,
+CONCAT(CITY,' ',STREET_ADDRESS1,' ',STREET_ADDRESS2) AS 전체주소,
+CONCAT(LEFT(TLNO, 3), '-', MID(TLNO, 4, 4), '-', RIGHT(TLNO, 4)) AS 전화번호
+FROM USED_GOODS_BOARD GB
+INNER JOIN USED_GOODS_USER GU
+ON GB.WRITER_ID=GU.USER_ID
+GROUP BY  USER_ID
+HAVING COUNT(USER_ID)>2
+ORDER BY USER_ID DESC
+
+2번 : 조회수가 가장 많은 중고거래 게시판의 첨부파일 조회하기
+SELECT CONCAT('/home/grep/src/',GB.BOARD_ID,'/',FILE_ID,FILE_NAME,FILE_EXT)AS FILE_PATH
+FROM USED_GOODS_BOARD GB
+INNER JOIN USED_GOODS_FILE GU
+ON GB.BOARD_ID=GU.BOARD_ID
+WHERE GB.VIEWS = (
+    SELECT MAX(GB.views)
+    FROM USED_GOODS_BOARD GB )
+ORDER BY FILE_ID DESC

K_ule/2023.04.03-L4

@@ -0,0 +1,33 @@
+1번 : 보호소에서 중성화한 동물
+SELECT AO.ANIMAL_ID,AO.ANIMAL_TYPE,AO.NAME
+FROM ANIMAL_INS AI
+INNER JOIN ANIMAL_OUTS AO
+ON AI.ANIMAL_ID = AO.ANIMAL_ID
+WHERE AI.SEX_UPON_INTAKE LIKE 'Intact%' 
+AND AO.SEX_UPON_OUTCOME NOT LIKE 'Intact%'
+
+2번 : 입양 시각 구하기(2)
+WITH RECURSIVE TIME AS (
+    SELECT 0 AS HOUR
+    UNION ALL
+    SELECT HOUR + 1 FROM TIME WHERE HOUR < 23
+)
+
+SELECT T.HOUR,
+IF(AO.HOUR IS NULL,0,AO.COUNT)AS COUNT
+FROM (
+    SELECT HOUR(DATETIME) AS HOUR, 
+        COUNT(ANIMAL_ID) AS COUNT
+    FROM ANIMAL_OUTS
+    GROUP BY HOUR
+)AO
+RIGHT JOIN TIME T
+ON T.HOUR = AO.HOUR
+
+3번 : 우유와 요거트가 담긴 장바구니
+SELECT C1.CART_ID
+FROM CART_PRODUCTS C1
+INNER JOIN CART_PRODUCTS C2
+ON C1.CART_ID=C2.CART_ID
+WHERE C1.NAME = 'Yogurt' AND C2.NAME ='Milk'
+GROUP BY CART_ID