i want to select from table by row i want to give the row number not any value

Here's something. Assuming the table [tablename] was made like this:

--USE [cpqaAnswers]
--GO
--CREATE SCHEMA [cpqa]
CREATE TABLE [cpqa].[tablename](
   [row][nvarchar](76)
    )

Do this:

CREATE TABLE [cpqaAnswers].[cpqa].[tablenameIdx](
   [theRowNumber][int]IDENTITY(1,1),
     [row][nvarchar](76)
     )

Then, do this:

INSERT INTO [cpqaAnswers].[cpqa].[tablenameIdx]
  SELECT * FROM [cpqaAnswers].[cpqa].[tablename]

Now there's an index prefixed to the previous data table and, using the assignment style mentioned, each line of data is accessible through it.