在sql server中查找最大数据

Question

我有这种表并找到最大标记

STUDENT

|id | name  | mark |
|1  | john  | 56   |
|2  | sara  | 81   |
|3  | mattew| 65   |

out假设是这样的

|id | name  | mark |
|2  | sara  | 81   |

但是我得到了这种输出

|id | name  | mark |
|1  | john  | 81   |

我在sql中写这个

SELECT id,name,MAX(mark)
FROM student;
WHERE name IN
(SELECT name
FROM student);

我该如何更正sql？

Answer 1

在SQL Server中，您可以使用

SELECT TOP 1 WITH TIES *
FROM student
WHERE mark IS NOT NULL
ORDER BY mark DESC

虽然您也可以使用逻辑上等效的标准SQL

SELECT *
FROM   student
WHERE  mark = (SELECT MAX(mark)
               FROM   student) 

Answer 2

您可以使用此简单查询来获得相同的结果：

  SELECT TOP 1 WITH TIES ID,NAME,mark 
    FROM STUDENT
    ORDER BY MARK DESC