sql - select month by day -


i need write query print daily statistics of calls. calls table looks this: 

user    date 1       3/6/2011 1       15/7/2011

my results should this: 

date               count  1/6/2011            0 2/6/2011            0 3/6/2011            1 ... 30/6/2011           0

how can that??

try with:

select month.date, count(userid) generate_series(date '2011-06-01', date '2011-06-30', '1 day') month left join calls on (month.date = calls.date) group month.date order month.date asc;

more general solution (so can specify month , year parameter):

select month.date, count(userid) generate_series(date '2011-06-01', date '2011-06-01' + interval '1 month' - interval '1 day', '1 day') month left join calls c on (month.date = c.date) group month.date order month.date asc;

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