LeetCode（数据库）- 不同性别每日分数总计

Posted 2021-10-03 程序员牧码

题目链接：点击打开链接

题目大意：略。

解题思路：略。

AC 代码

-- 解决方案(1)
SELECT s1.gender, s1.day, SUM(s2.score_points) AS total
FROM Scores AS s1, Scores AS s2
WHERE s1.gender = s2.gender AND s1.day >= s2.day
GROUP BY s1.gender, s1.day
ORDER BY s1.gender, s1.day;

-- 解决方案(2)
SELECT gender, day, SUM(score_points) OVER w AS total
FROM Scores
WINDOW w AS (PARTITION BY gender ORDER BY day);

-- 解决方案(3)
SELECT gender, day, SUM(score_points) OVER(PARTITION BY gender ORDER BY gender, day) total
FROM Scores