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get distinct Dates from timestamp values

Posted on 2013-10-23
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Last Modified: 2013-10-25
hi guys
I have  a MODIFY_DATE timestamp column with values like this
MODIFY_DATE
2013-10-18 10:54:02.270
2013-10-18 10:54:02.270
2013-10-22 06:30:35.373
2013-10-23 16:51:14.790
2013-10-23 16:51:14.790


I am trying to get the Distinct Date from the column, my resultset should look like this
2013-10-18
2013-10-22
2013-10-23

what i have is
select distinct cast(MODIFY_DATE AS Date) as Date from CUSTOMER_TABLE
 where  cast(MODIFY_DATE AS Date) = DATEADD(day, 0, convert(date, GETDATE()))
but this will get only todays date.

Any idea how i can acchieve this?

thanks
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Question by:royjayd
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4 Comments
 
LVL 66

Accepted Solution

by:
Jim Horn earned 1200 total points
ID: 39595618
Worked for me without the WHERE clause..
CREATE TABLE #foo (MODIFY_DATE datetime) 

INSERT INTO #foo (MODIFY_DATE)
VALUES
	('2013-10-18 10:54:02.270'), 
	('2013-10-18 10:54:02.270'), 
	('2013-10-22 06:30:35.373'), 
	('2013-10-23 16:51:14.790'), 
	('2013-10-23 16:51:14.790')

select distinct cast(MODIFY_DATE AS Date) as Date 
from #foo

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LVL 66

Assisted Solution

by:Jim Horn
Jim Horn earned 1200 total points
ID: 39595621
>where  cast(MODIFY_DATE AS Date) = DATEADD(day, 0, convert(date, GETDATE()))
What were you trying to accomplish with the above statement?
DateAdd(day, 0, any date) will equal any date.
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LVL 50

Assisted Solution

by:PortletPaul
PortletPaul earned 400 total points
ID: 39596196
no points please:

yep, all you need to do is remove the where clause

>> where  cast(MODIFY_DATE AS Date) = DATEADD(day, 0, convert(date, GETDATE()))
>> but this will get only todays date.
because that's what you just asked for :)

cast(MODIFY_DATE AS Date)  also could be: convert(date,Modify_date)
convert(date, GETDATE()) also could be: cast(getdate() AS Date)

so, your where clause could be rewritten as:

where cast(MODIFY_DATE AS Date)  = cast(getdate() AS Date)

i.e. only where that field = today
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Author Comment

by:royjayd
ID: 39597940
thanks y'all
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