将ms-access last（）函数转换为sql server 2008

Question

How to convert ms-access last() function to sql server 2008 equivalent query? code is

SELECT 
    DISTINCT Last([Title].[Number) AS Row_ID 
FROM [Title] 
HAVING (Last([Title].[Number]) Is Null)

Answer 1

它没有直接等价的关系，但是通常可以通过ORDER BY和ROW_NUMBER() ，或者可能是MAX的组合来实现-如果您提供更多的上下文和样本数据，则更容易给出确定的答案

Answer 2

Try this

Select Top 1 Number From
(
  Select Number From Title ORDER BY Number DESC
)

Answer 3

尝试在（...）上使用LAST_VALUE（Title.Number）

Answer 4

You need to use sub-query with ORDER BY because sql-server doesn't guaranty order of rows without this clause . See the example.

declare @tbl table(f1 int, f2 varchar(10), d datetime)

insert into @tbl values (1,'1-first','20120917')
insert into @tbl values (1,'1-middle','20120918')
insert into @tbl values (1,'1-last','20120919')
insert into @tbl values (2,'2-just one','20120917')


select f1, (select TOP 1 f2 from @tbl t2 where t2.f1=t1.f1 order by d DESC) Last_f2
from @tbl t1
group by f1