sql server - Count group by date zero result -

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i have sql report:

select      count(id_reg) total,      year(fechaingreso) ano,      month(fechaingreso) mes,      day(fechaingreso) dia       vw_casos_tc       fechaingreso between '2012-12-05' , '2013-5-8'  group       day(fechaingreso), month(fechaingreso), year(fechaingreso)  order      ano, mes, dia

it works fine excepts days have no records when count(id_reg) = 0, days doesn't appear on result.

total   ano     mes     dia ----------------------------- 66  2012    12  13 22  2012    12  14 23  2012    12  17

there no result (2012 12 15 , 2012 12 16). how can modify script days total = 0 ?

here way, assuming sql server 2008 (though can modify sql server 2005):

declare @startdate date, @enddate date set @startdate = '20121205' set @enddate = '20130508';  alldays (     select @startdate yourdate     union     select dateadd(day,1,yourdate)     alldays     dateadd(day,1,yourdate) <= @enddate ) select  a.yourdate,         isnull(b.total,0) total alldays left join ( select  convert(date,fechaingreso) yourdate,                     count(id_reg) total             vw_casos_tc             fechaingreso >= @startdate                , fechaingreso < dateadd(day, 1, @enddate)             group convert(date,fechaingreso)) b     on a.yourdate = b.yourdate option(maxrecursion 0)

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