如何從driverid獲得第二個最後的記錄SQL服務器

Question

我有以下以下我有三個記錄在DriverID「134」我想第二個最後的數據這個人怎麼幫助我如何獲得第二個最後的數據 和 你能否請幫助我如何從我的表排序每秒最後的記錄混帳的數據不止一個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 

要處理的時候，只有一個紀錄爲給DriverID然後使用這個

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：如果在最後一秒記錄領帶和你想同時記錄然後使用DENSE_RANK代替ROW_NUMBER

更新：

要查找的倒數第二個記錄爲全部DriverID's在Row_number中添加分區並從Where子句中刪除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