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Count date in tsql with smalldatetime

Posted on 2014-11-21
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Last Modified: 2014-11-24
I'm trying to update this query and return a column with the date/month/year along with the count of how many records are in each day.
SubmitDate datatype is smalldatetime
Part of the problem is that the smalldatetime also includes also includes hour/minutes/seconds.

SELECT COUNT(SubmitDate) AS CountDate
FROM MyTable
GROUP BY DATEADD(dd, 0, DATEDIFF(dd, 0, SubmitDate))

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Thanks.
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Question by:javierpdx
3 Comments
 
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Accepted Solution

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Richard Obenchain earned 300 total points
ID: 40458856
Why not just put the grouping value in the select list?

Like so:

SELECT DATEADD(dd, 0, DATEDIFF(dd, 0, SubmitDate)) as Day, COUNT(SubmitDate) AS CountDate
FROM MyTable
GROUP BY DATEADD(dd, 0, DATEDIFF(dd, 0, SubmitDate))

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Or did you need separate columns for each value year, month, and day?
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Assisted Solution

by:PortletPaul
PortletPaul earned 200 total points
ID: 40458871
As you have SQL 2012 in your tags you could use CAST(SubmitDate as date)
and then also use FORMAT() to get the desired display

SELECT  FORMAT(CAST(SubmitDate as date),'dd/MM/yyyy') as OnDate, COUNT(SubmitDate) AS CountDate
FROM MyTable
GROUP BY  CAST(SubmitDate as date)

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While DATEADD(dd, 0, DATEDIFF(dd, 0, SubmitDate)) is very useful for older versions of SQL Server it doesn't have an advantage here as all we want is the date. As indicated above it's not clear if you just want one column in dd/MM/yyyy format or 3 columns.
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Author Closing Comment

by:javierpdx
ID: 40462612
I appreciate the help!
These solutions worked great.
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