In the past, I would usually just create a client side or front-end function to change the way data is displayed to the user but this example shows how to do this in SQL Server using a User Defined Function or UDF.
CREATE FUNCTION [dbo].[GradeConversion](@Grade varchar(50))
RETURNS varchar(50)
AS
BEGIN
DECLARE @MyOutput varchar(50)
If @Grade='A'
SET @MyOutput = 'Low Concern'
Else if @Grade='B'
SET @MyOutput = 'Low Concern'
Else if @Grade='C'
SET @MyOutput = 'Moderate Concern'
Else if @Grade='D'
SET @MyOutput = 'High Concern'
Else if @Grade='F'
SET @MyOutput = 'Very High Concern'
Else
SET @MyOutput = 'Not Rated'
RETURN @MyOutput
END
To call this function you would simply do this dbo.GradeConversion(dbo.companyRatings.ScoreCEOComp) AS ScoreCEOComp