🐜 Study: 년, 월, 성별 별 상품 구매 회원 수 구하기 (#53)

Author: ing-eoking

ing-eoking/년, 월, 성별 별 상품 구매 회원 수 구하기.sql

@@ -0,0 +1,15 @@
+SELECT
+    YEAR(os.sales_date) AS YEAR,
+    MONTH(os.sales_date) AS MONTH,
+    GENDER,
+    COUNT(DISTINCT os.USER_ID) AS USERS
+FROM 
+    ONLINE_SALE os
+LEFT JOIN 
+    USER_INFO ui ON os.USER_ID = ui.USER_ID
+WHERE
+    GENDER IS NOT NULL
+GROUP BY
+    YEAR, MONTH, GENDER
+ORDER BY
+    YEAR, MONTH, GENDER;