Write a SQL query to rank scores. If there is a tie between two scores, both should have the same ranking. Note that after a tie, the next ranking number should be the next consecutive integer value. In other words, there should be no "holes" between ranks.
+----+-------+ | Id | Score | +----+-------+ | 1 | 3.50 | | 2 | 3.65 | | 3 | 4.00 | | 4 | 3.85 | | 5 | 4.00 | | 6 | 3.65 | +----+-------+
For example, given the above Scores table, your query should generate the following report (order by highest score):
+-------+------+ | Score | Rank | +-------+------+ | 4.00 | 1 | | 4.00 | 1 | | 3.85 | 2 | | 3.65 | 3 | | 3.65 | 3 | | 3.50 | 4 | +-------+------+
分数排名 - LeetCode (中国) https://leetcode-cn.com/problems/rank-scores/description/
优化 简化
SELECT s.Score,tt.Rank FROM Scores s LEFT JOIN
(
SELECT (@i:=@i+1) Rank,t.* FROM (SELECT COUNT(Id) AS c,Score FROM Scores GROUP BY Score ORDER BY Score DESC ) AS t , (SELECT @i:=0) AS a
) AS tt ON s.Score=tt.Score ORDER BY Rank ASC;