Generate random AlphaNumeric string using Stored Procedure in SQL Server

Hello

I have this sp which generate number random i want it should generate alpha numeric

Please advice.

create PROCEDURE [dbo].[Random_Number_Generator] 
    -- Add the parameters for the stored procedure here
    @min_integer int 
    ,@max_integer int 	
AS
BEGIN
    begin try
        drop table #rand_digits
    end try
    begin catch
        print '#rand_digits not available to drop'
    end catch
 
    create table #rand_digits
    (
        rand_digit tinyint
    )
 
    -- declare min and max random digit values
    -- and variables values to control loop count
    declare @loop_ctr int = 0,@max_loop_ctr int = 1000
 
    -- loop 1000 times 
    while @loop_ctr < @max_loop_ctr
    begin 
        -- generate a random digit from @min_integer through @max_integer
        -- and insert it into #rand_digits 
        insert #rand_digits(rand_digit)
        select floor(rand()*(@max_integer - @min_integer + 1) + @min_integer) 
        set @loop_ctr = @loop_ctr + 1 
    end
 
    -- count the number of each randomly computed digit
    -- and display the results
    select rand_digit, count(*) [frequency]
    from #rand_digits
    group by rand_digit
    --order by rand_digit
    order by newid()
END