FIll in missing months

Question

I am querying a table that includes the rider id, the date of the ride and the distance. Problem is that they may not have ridden I In a given month, so I want to include that month with a distance of 0, so all twelve months are listed. Here s my attempt...
however it doesn't pick up the zero moths.
alter PROCEDURE dbo.UM_getmonthlymiles
-- Add the parameters for the stored procedure here
@YEAR INT
, @RIDER INT
AS
BEGIN
declare @months table
monthnum int
--, mnthname varchar(3)
insert into @months
select MonthInt
from (
select 1 as MonthInt union all select 2 union all select 3 union all select 4 union all
select 5 as MonthInt union all select 6 union all select 7 union all select 8 union all
select 9 as MonthInt union all select 10 union all select 11 union all select 12
)M
select* from @months
declare @mnthmiles table
distance float
, riderid int
--, mnthname varchar(10)
, monthnumber int
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
insert into @mnthmiles
select isnull(sum(distancemiles),0), @RIDER, isnull(DATEPART(mm,ridedate), M.monthnum)--) --as [num}
from mileagelog
LEFT JOIN @months M
ON M.monthnum = DATEPART(mm,ridedate)
where DATEPART(yyyy,ridedate) = @year
and riderid = @rider
group by DATEPART(mm,ridedate), riderid, DATENAME(mm,ridedate), DATEPART(mm,ridedate), M.monthnum order by DATEPART(mm,ridedate), M.monthnum
select * from @mnthmiles

Answer 1

Naomi,
Thanks a lot for pinting that out :) Posting below the corrected code..
Dave, the below code runs fine for your requirement and sums up values in case there are multiple distance values present for the same rider in a month..
declare @months table
monthnum int
--, mnthname varchar(3)
insert into @months
select MonthInt
from (
select 1 as MonthInt union all select 2 union all select 3 union all select 4 union all
select 5 as MonthInt union all select 6 union all select 7 union all select 8 union all
select 9 as MonthInt union all select 10 union all select 11 union all select 12
)M
declare @rider table(id int, rdt datetime, distance int);
insert into @rider values (1, dateadd(m,-5,Getdate()),200)
insert into @rider values (1, dateadd(m,-4,Getdate()),500)
insert into @rider values (1, dateadd(m,-4,Getdate()),111) --multiple values per month for same rider
insert into @rider values (1, dateadd(m,-2,Getdate()),100)
insert into @rider values (1, dateadd(m,-1,Getdate()),1000)
insert into @rider values (1, dateadd(m,0,Getdate()),100)
insert into @rider values (1, dateadd(m,2,Getdate()),550)
insert into @rider values (1, dateadd(m,4,Getdate()),560)
insert into @rider values (2, dateadd(m,4,Getdate()),560)
insert into @rider values (2, dateadd(m,4,Getdate()),222) --multiple values per month for same rider
;with cte
as
select distinct id as riderid, m.monthnum
from @rider r cross join @months m
select c.riderid,c.monthnum,isnull(sum(r.distance),0) as distance
from cte c
left join @rider r on c.riderid=r.id and c.monthnum=month(r.rdt)
group by c.riderid,c.monthnum
order by c.riderid,c.monthnum
Thanks,
Jay
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