如果多行具有相同的名稱值，返回最高ID值

Question

ID Name Address Birthdate 

1 Steven NULL 1982-01-23 

2 Andrew 2 Katherine St 1979-10-06 

3 Andrew 81 South Rd NULL 

在上面的表中，如果我在文本框中輸入安德魯我想要獲取數據與ID號= 3。如何做呢？

Answer 1

所有獨特的名字：

;WITH cte AS 
(
    SELECT ID, Name, Address, Birthdate, 
    rn = ROW_NUMBER() OVER (PARTITION BY Name ORDER BY ID DESC) 
    FROM dbo.tablename 
) 
SELECT ID, Name, Address, Birthdate 
FROM cte 
WHERE rn = 1; 

對於只有一個：

SELECT TOP (1) ID, Name, Address, Birthdate 
    FROM dbo.tablename 
    WHERE Name = 'Andrew' 
    ORDER BY ID DESC; 

Answer 2

declare @name varchar(100) = 'Andrew' 

select top 1 * 
from MyTable 
where Name = @name 
order by ID desc 

Answer 3

假定表名是 'MY_TABLE'。 試試這個：

SELECT max(ID) FROM my_table WHERE Name = 'Andrew' 

更多關於max函數here。