如何从driverid获得第二个最后的记录SQL服务器

Question

我有以下以下我有三个记录在DriverID“134”我想第二个最后的数据这个人怎么帮助我如何获得第二个最后的数据 和 你能否请帮助我如何从我的表排序每秒最后的记录混帐的数据不止一个driverid

Answer 1

使用Row_Number()窗口功能

With cte as 
(
select *,Row_Number()over(order by Transdate desc) as Rn from yourtable 
Where DriverID = 134 
) 
Select * 
from cte 
Where Rn = 2 

要处理的时候，只有一个纪录为给DriverID然后使用这个

With cte as 
(
select *,Row_Number()over(order by Transdate desc) as Rn, 
count(1)over() as cnt from yourtable 
Where DriverID = 134 
) 
Select * 
from cte 
Where (Rn = 2 and cnt > 1) or (Rn = 1 and cnt = 1) 

注：如果在最后一秒记录领带和你想同时记录然后使用DENSE_RANK代替ROW_NUMBER

更新：

要查找的倒数第二个记录为全部DriverID's在Row_number中添加分区并从Where子句中删除DriverID子句

With cte as 
(
select *,Row_Number()over(Partition by DriverID order by Transdate desc) as Rn, 
count(1)over(Partition by DriverID) as cnt from yourtable 
) 
Select * 
from cte 
Where (Rn = 2 and cnt > 1) or (Rn = 1 and cnt = 1) 

Answer 2

SELECT * FROM (
    SELECT 
ROW_NUMBER() OVER (ORDER BY key DEC) AS rownumber, 
columns 
FROM tablename 
) AS foo 
WHERE rownumber <= 2