I use this function when writing reports.

Use:

SELECT
  time.Date
  , Count(tab.ID) AS [Count]
FROM
  dbo.TimeDimension('1/1/2007 00:00:00', '12/31/2007 23:59:59', 'month', 1) time
  LEFT OUTER JOIN
   TempTable tab
  ON tab.DateCreated BETWEEN time.Date AND time.DateEnd

Here is the function. I don’t know if there is a better way to do this, if there is can someone tell me. As far as I know I am the only person to post a function like this.

CREATE FUNCTION [dbo].[TimeDimension] (
 @DateStart datetime
 , @DateEnd datetime
 , @Type varchar(20)
 , @IncrementValue int
)
RETURNS @Dates TABLE ( Date datetime , DateEnd datetime )
AS
BEGIN
 DECLARE @DateCurrent datetime, @NextDate datetime
 SET @DateCurrent = @DateStart

 WHILE (@DateCurrent <= @DateEnd)
 BEGIN
 SET @NextDate = CASE (@Type)
 WHEN 'year' THEN DateAdd(year, @IncrementValue, @DateCurrent)
 WHEN 'quarter' THEN DateAdd(quarter, @IncrementValue, @DateCurrent)
 WHEN 'month' THEN DateAdd(month, @IncrementValue, @DateCurrent)
 WHEN 'dayofyear' THEN DateAdd(dayofyear, @IncrementValue, @DateCurrent)
 WHEN 'day' THEN DateAdd(day, @IncrementValue, @DateCurrent)
 WHEN 'week' THEN DateAdd(week, @IncrementValue, @DateCurrent)
 WHEN 'weekday' THEN DateAdd(weekday, @IncrementValue, @DateCurrent)
 WHEN 'hour' THEN DateAdd(hour, @IncrementValue, @DateCurrent)
 WHEN 'minute' THEN DateAdd(minute, @IncrementValue, @DateCurrent)
 WHEN 'second' THEN DateAdd(second, @IncrementValue, @DateCurrent)
 WHEN 'millisecond' THEN DateAdd(millisecond, @IncrementValue, @DateCurrent)
 END

 INSERT INTO @Dates ( Date , DateEnd )
 VALUES ( @DateCurrent , DateAdd(second, -1, @NextDate) )

 SET @DateCurrent = @NextDate
 END
 RETURN
END