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SQL Statment

Posted on 2013-06-20
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Last Modified: 2013-06-21
In my sql server table i have fields where the data looks like this:

2007-08-25 12:03:43.333

I don't want the time values so how do i update so they look like this

2007-08-25 00:00:00.000
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Question by:vbnetcoder
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7 Comments
 
LVL 1

Accepted Solution

by:
RCWade earned 500 total points
ID: 39263369
Try this:

select DATEADD(Day, DATEDIFF(Day, 0, '2007-08-25 12:03:43.333'), 0)
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Author Comment

by:vbnetcoder
ID: 39263376
I need to do this to ALL the rows for a specific field.
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LVL 32

Expert Comment

by:Ephraim Wangoya
ID: 39263401
update table
set column = DATEADD(Day, DATEDIFF(Day, 0, Column), 0)
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LVL 8

Expert Comment

by:didnthaveaname
ID: 39263448
update <table>
set <column> = convert( datetime, convert( varchar, <column>, 112 ), 121 );

Edited to reflect update.  Clever uses of those, ewangoya =)
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LVL 49

Expert Comment

by:PortletPaul
ID: 39264963
I get a little concerned when folks tell me their field "looks like" (a date)

Is the field a datetime data type, or is it a string of characters (varchar or nvarchar)?
either can "look like" what you describe, but they differ a LOT.

Then, there is the following question:
WHY  update that data this to remove time? - curious thing to do.
You will loose precision (e.g. in ordering data)
IF you are doing this for date range filtering - I wouldn't
IF your field is a datetime data type (a "real datetime field') then
update table
set column = DATEADD(Day, DATEDIFF(Day, 0, Column), 0) -- all versions
or
update table
set column = convert(date,Column) -- sql 2008+
IF your field is a string data type (varchar or nvarchar) then
update table
set column = convert( varchar(10), Column , 112 ) + ' 00:00:00'
or (to remove time completely)
update table
set column = convert( varchar(10), Column , 112 )
Whatever you do here - please check the actual field data type first
test
backup
make absolutely certain you want to do this
think about it
when utterly certain - only then do it

more at: http://sqlfiddle.com/#!3/1cfd2/3

{+ edit, btw if you do choose DATEADD(Day, DATEDIFF(Day, 0, Column), 0)  
all points to ewangoya please  - it's a good method, v.fast too }
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LVL 1

Expert Comment

by:yechan
ID: 39266699
A somewhat radical idea is to change the data type of the column from DateTime to just Date.
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Author Closing Comment

by:vbnetcoder
ID: 39266713
this gave me what i needed i was able to figure out the rest. TY
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