Concatenating two Float columns and insert them to another Float column in SQL Server 2008 R2 -

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I am dealing with a situation as mentioned in the question:

Give me two Float column that I want to add: 

  (column 1 + '_' + column2)

and < Insert in Code> column3 .

I think the right question will be something like this: 

  Set as an updated table A.Column3 = select ((Column1 + '_' <+++   
 
 class = "post text" itemprop = "text"> 
 If you want to be sure to avoid getting faucet, then you need to do something like this Use:  
  UPDATE dbo.YourTable SET Column3 = Convert (NVHAR (50), ISNUL (Column 1, N '')) + N'_ '+ Convert (NVHAR (50) , ISNLL (column2, n ''))  
 
 Assume that all three You are in the same table, otherwise you will need to use  JOIN  in your  UPDATE  
 
  Update:  Converting the  FLOAT  column to  NVARCHAR  in the  CONVERT  function
) is required.

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