Merge pull request #857 from xuyanMax/master

Update Leetcode-Database.md

Author: CyC2018

notes/Leetcode-Database 题解.md

@@ -890,7 +890,7 @@ ORDER BY
 | score | Rank |
 | :---: | :--: |
 |  4.2  |  1   |
-|  4.2  |  2   |
+|  4.2  |  1   |
 |  4.1  |  2   |
 
 连接情况如下：