Select Sum(cli_num), ltrim(rtrim(convert(char,datepart(day,cli_fec)))) + ' ' + datename(month,cli_fec) + ' ' + datename(Year,cli_fec) From CLIENTE
group by ltrim(rtrim(convert(char,datepart(day,cli_fec)))) + ' ' + datename(month,cli_fec) + ' ' + datename(Year,cli_fec),datepart(day,cli_fec) + datepart(month,cli_fec) + datepart(year,cli_fec)
order by datepart(day,cli_fec) + datepart(month,cli_fec) + datepart(year,cli_fec)
Dime si es esto lo que buscas, saludos.