SQL查詢得到的價格爲第二最晚日期

Question

我有這個疑問：

select @cost = @cost +     
    (select top 1 price from 
    (select top 2 price, date from myTable order by date DESC) 
    order by date ASC 
) 

而且我得到錯誤：關鍵字「順序」附近有語法錯誤。 如何解決這個問題？

Answer 1

我想這個子查詢

(select top 2 price, date from myTable order by date DESC) 

需要一個別名，像這樣

(select top 2 price, date from myTable order by date DESC) sq 

但我會寫這樣的：

SELECT @cost = @cost + (
SELECT price FROM (
SELECT price, date, ROW_NUMBER() OVER (ORDER BY date DESC) AS rownum 
) sq WHERE rownum = 2 
)