SQL學習筆記：選取第N條記錄

Northwind數據庫，選取價格第二高的產品。

有兩種方法，一個是用Row_Number()函數：

SELECT productname FROM 
    (SELECT TOP 2 productname, Row_Number() OVER (ORDER BY unitprice desc) AS rownum
     FROM Products) AS tbl
WHERE rownum = 2;

另外一種是對子語句的的結果再進行排序：

SELECT top 1 productname FROM 
    (SELECT TOP 2 productname,unitprice 
     FROM Products order by unitprice desc) AS tbl
order by tbl.unitprice asc