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Author: wave-gbt

Database/178. Rank Scores.md

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+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    |
++-------+------+
+```
+
+**SQL**
+```
+# Write your MySQL query statement below
+SELECT s2.Score,s1.Rank From
+(
+SELECT S1.Score, COUNT(*) as Rank
+    FROM 
+        (SELECT DISTINCT Score from Scores) as S1,
+        (SELECT DISTINCT Score from Scores) as S2 
+        Where S1.Score<=S2.Score
+        Group By S1.Score
+) s1 ,Scores s2 
+WHERE s1.Score = s2.Score Order BY s2.Score desc
+```