@date_en datetime = getdate()

select [@date_start] = @date_start,

[@date_en] = @date_en,

concat(dy, ':', hr, ':', mn, ':', sc, '.', ms)

from (

select dy = abs(diff_mins / 60 / 24),

hr = diff_mins / 60 % 24,

mn = diff_mins % 60,

sc = datediff(second, dateadd(minute, diff_mins, @date_start), @date_en),

ms = (datepart(millisecond, @date_en) - datepart(millisecond, @date_start) + 1000) % 1000

from (

select diff_mins = datediff(minute, @date_start, @date_en)

) d

) d