SQL Server: Count based on date and two different times - sql

Question

OS - WindowsXP
SQL Server Management Studio 2008 R2
I am trying to get a count of the number of projects based on the release date, NOT date and TIME. However, some projects have the same release date but a different time and are treated as a separate project. As long as the project has the same date, I want it to be counted.
'Releasedate' on the server is a "datetime"
Select ProjectName, count(ProjectName) as Count, (Releasedate)
From DBTable Where Releasedate >= convert(nvarchar,(getdate()))
Group by projectname,releasedt
Current Results:
ProjectName Count Releasedate
Project_Nm_1 1 2010-03-27 00:00:00
Project_Nm_1 1 2010-03-27 08:00:00
Project_Nm_2 1 2010-03-27 00:00:00
Project_Nm_2 1 2010-03-27 08:00:00
I would like to see:
Project_Nm_1 2 2010-03-27
Project_Nm_2 2 2010-03-27

Answer 1

SQL Server 2008 introduced the new DATE datatype which does exactly what you're looking for - handle only the date, without any time. So just CAST your field to DATE and you should be fine:
SELECT
ProjectName, COUNT(ProjectName) as Count, CAST(Releasedate AS DATE)
FROM
dbo.DBTable
WHERE
CAST(Releasedate AS DATE) >= CAST(GETDATE() AS DATE)
GROUP BY
projectname, CAST(ReleaseDate as DATE)

Answer 2

To group by date only, try using the CONVERT function:
GROUP BY projectname, CONVERT(nvarchar, Releasedate, 101)
You'll want to use the same CONVERT function call in the select column list so that query's output shows just the date, as well.
Take a look at:
http://codingforums.com/showthread.php?t=56536

Answer 3

You can get the date portion of the ReleaseDate datetime using
DateAdd(dd, 0, DateDiff(dd, 0, ReleaseDate))
Therefore your query becomes
SELECT
ProjectName,
Count(ProjectName) as Count,
DateAdd(dd, 0, DateDiff(dd, 0, ReleaseDate)) as ReleaseDate
FROM
DBTable
WHERE
ReleaseDate >= getdate()
GROUP BY
ProjectName,
DateAdd(dd, 0, DateDiff(dd, 0, ReleaseDate))
If you find yourself stripping the time from datetimes frequently, then encapsulate it in a UDF.

Answer 4

Select
ProjectName, count(ProjectName) as CountProjects, Releasedate
From
DBTable
Where
Releasedate >= convert(nvarchar, getdate())
Group by
projectname,releasedt
Order by
CountProjects desc
P.S. Don't use built-in functions while choosing alias of any column

Answer 5

You could simply GROUP BY the parts of the date you want using DATEPART
SELECT
ProjectName,
Count(*),
DATEPART(year, Releasedate) as ReleaseYear,
DATEPART(month, Releasedate) as ReleaseMonth,
DATEPART(day, Releasedate) as ReleaseDay
FROM
DBTable
WHERE
Releasedate >= convert(nvarchar,(getdate()))
GROUP BY
ProjectName,
DATEPART(year, Releasedate),
DATEPART(month, Releasedate),
DATEPART(day, Releasedate)
I'll leave combining those parts into one field as an exercise for you if you want, but this will ignore the time portion of Releasedate when grouping

Answer 6

To explain:
declare #dt datetime
set #dt = '2010/12/22 12:34:56'
print #dt
print convert(char(8), #dt, 112)
Result:
Dec 22 2010 12:34PM
20101222
So, use
GROUP BY convert(char(8), releasedt, 112)