Question

I am talking about SQL Server 2008. I have table with three nvarchar columns. I want to select first column at Nth row, second column from Mth row, third column from Kth row where M,N,K are not equal one to another.

How to write such a query? Also is it possible to select random row?

Answer 1

You can use a CTE with a ROW_NUMBER() function to achieve this:

;WITH CTE AS
(
   SELECT 
      Column1, Column2, Column3,
      (your list of additional columns - if needed),
      RN = ROW_NUMBER() OVER (ORDER BY InsertionDate)
)
SELECT 
    FirstValue = (SELECT Column1 FROM CTE WHERE RN = N),
    SecondValue = (SELECT Column2 FROM CTE WHERE RN = M),
    ThirdValue = (SELECT Column3 FROM CTE WHERE RN = K)

You need to replace the N, M, K with actual integer values in this query – or define SQL variables to hold those three values.