SQL: Is there a possibility to convert numbers (1,2,3,4…) to letters (A,B,C,D…)

Question

Is there a possibility to obtain letters (like A,B) instead of numbers (1,2) e.g. as a result of Dense_Rank function call(in MS Sql) ?

Answer 1

I used this as a basis for my function to convert integers to base26 character strings

DECLARE @Input integer  = 3000

DECLARE @Value     integer  
DECLARE @Quotient  integer      = 0
DECLARE @Remainder integer      = 0
DECLARE @Output    varchar(max) = ''

DECLARE @BASE char(26) = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'

SET @Value = @Input

WHILE @Value > 0 BEGIN

  SET @Quotient  = @Value / 26
  SET @Remainder = @Value % 26

  SET @Output = substring(@BASE,@Remainder,1) + @Output

  SELECT @Value = @Quotient

END

SELECT @Output --- DKJ