Selecting Nth Record in an SQL Query

Question

I have an SQL Query that i\'m running but I only want to select a specific row. For example lets say my query was:

Select * from Comments

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Answer 1

This is a classic interview question.

In Ms SQL 2005+ you can use the ROW_NUMBER() keyword and have the Predicate ROW_NUMBER = n

USE AdventureWorks;
GO
WITH OrderedOrders AS
(
    SELECT SalesOrderID, OrderDate,
    ROW_NUMBER() OVER (ORDER BY OrderDate) AS 'RowNumber'
    FROM Sales.SalesOrderHeader 
)  

SELECT * 
FROM OrderedOrders 
WHERE RowNumber = 5;

In SQL2000 you could do something like

SELECT Top 1 *FROM
[tblApplications]
where [ApplicationID] In
(
    SELECT TOP 5 [ApplicationID]
    FROM [dbo].[tblApplications]
    order by applicationId Desc
)