LeetCode Rank Scores

标签：database   leetcode   sql   

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    |
+-------+------+

select a.score as Score, 
count(b.score) 
from (
    select distinct score 
    from Scores
)b, Scores a 
where b.score >= a.score 
group by a.score, a.id 
order by a.score desc;

LeetCode Rank Scores

标签：database   leetcode   sql   

原文地址：http://blog.csdn.net/u012925008/article/details/45012603