https://leetcode-cn.com/problems/rank-scores/
编写一个 SQL 查询来实现分数排名。如果两个分数相同，则两个分数排名（Rank）相同。请注意，平分后的下一个名次应该是下一个连续的整数值。换句话说，名次之间不应该有“间隔”。
SELECT Score, ( SELECT count(DISTINCT score) FROM Scores WHERE score >= s.score ) AS RankFROM Scores sORDER BY Score desc
