选择在SQL Server 2008

Question

我有表

ID  Name  Book 
1  Aaron  HTML 
2  Charles  DESIGN 
3  Mark  SQL 
4  Charles  JAVA 
5  Charles  C++ 
6  Mark  C# 

我想SELECT每Name最大ID行，其结果是这样的：提前

ID  Name  Book 
1  Aaron  HTML 
5  Charles  C++ 
6  Mark  C# 

感谢。

Answer 1

快速和肮脏的，但应该工作：

select * from [mytable] where id in 
    (select max(id) as id from mytable group by name) 

Answer 2

可以使用ROW_NUMBER()功能与CTE：

;WITH CTE AS 
(
    SELECT ID, Name, Book, ROW_NUMBER() OVER (PARTITION BY Name ORDER BY ID DESC) RN 
    FROM yourTable 
) 
SELECT ID, Name, Book 
FROM CTE 
WHERE RN = 1 

Fiddle Demo