Rounding Consistency When Casting -- Datetime Type

Mar 5, 2008

I would expect this query:



select

case when cast(DT as int) = cast(cast(DT as float) as int)

then 'Consistent'

else 'Inconsistent'

end

from (select cast('27 Jan 2008 13:00' as datetime) as DT) X


to always return 'Consistent'. My expectation is not satisfied; the question is, is it unfounded?

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Transact SQL :: Unexpected Rounding With MONEY When Casting To VARCHAR Or Printing

Dec 18, 2008

if I 'print' a MONEY value, or cast a MONEY variable to VARCHAR, it automatically rounds it to two decimal places. Maybe that's a built-in convenience, but I'd like to make it not do that.My workaround right now is to first cast my MONEY variabled to DECIMAL(30,4), and then cast the result to VARCHAR, but I'd like to avoid that step if possible.Consider the following

query:DECLARE @UnitCost MONEY  SET @UnitCost = .0167  SELECT      @UnitCost,      
CAST(@UnitCost AS VARCHAR(30)),     
CAST(CAST(@UnitCost AS DECIMAL(30, 4)) AS VARCHAR(30))  -
- Results in: 0.0167, 0.02, 0.0167 

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Sep 8, 2007

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the three existing date-related columns.  I have tried casting and
simple concatentation without success.  ALTER TABLE Details ADD DocDate DateTime NULL

UPDATE Details SET DocDate = CAST(MonthGiven AS DateTime)+ '/' + CAST(DayGiven AS DateTime) + "/" Cast(YearGiven As DateTime)
I think I need to be doing a Conversion instead of casting but
have been unable to implement info I have found in the SQL Server
Developer Center in my situation.

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Aug 10, 2007

Hello,

I have a varchar column that inludes dates in the following fomat: 03032007? When I try to cast this to datetime, I keep getting "Arithmetic overflow error converting expression to data type datetime." error. Maybe someone has some ideas how to handle this?


Thanks!

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Type Casting Varchar As Time

Apr 16, 2007

Hi.



Current development setup: Visual Studio 2005 (C# language), SQL Server 2005 Express Edition.



I am at this point changing some of my application. It stores a lot of information for times of trains. I decode a file which is text based and my times are stored in varchar(4) columns with the format "HHmm".



I am now at a stage where I need to add values to these times and perform a search based on two time values (a minimum time and maximum time).



I really need to be able to add another varchar(4) value to the times stored in my database (also varchar(4) - may look at this again in future). I have absolutely no interest in storing seconds, modifying the database to include the time colon, nor am I interested in the date portion of a time string, only the 4 digits representing the hours and minutes.



Can this be done easily in SQL server? For example:



varchar(4) of 0445 + varchar(4) of 0027 should result in the time 0512.



Similarly a varchar(4) of 2358 + varchar(4) of 0015 should result in the time 0013.



This has to be very quick to execute.



Thanks for any help you can offer!



Sean



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How To Do Type Casting In The Derived Column Expressions Field

Jan 10, 2007



Hi:

I have a Derived Column, called Column1, which has a value "PS" in the Expression field of the editor. SSIS detects it as a Unicode string[DT WSTR] in the Data Type property. In the source table, the column is a char datatype with the lenght of 4. How should I cast this in the expression field, so its converted to char(4). I would need the syntax for it, so I can use it in my Expression area. By the way, i am setting a constant value for this derived column, so in your example, pls use the value instead of column name. I would like to see, how it would be coded?? And also, is there a reference for the expression language somewhere for newbies??? thanks a bunch.



MA

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Convert DateTime To Date Using Rounding UDF

Feb 25, 2006

This UDF will strip off the time portion of a DateTime. It can give you either midnight last night, or midnight tonight.

Lets say you have two datetime values @dateStart and @dateEnd, and you want to select records between these dates (excluding any time portion), then you would do:

SELECT *
FROM MyTable
WHERE MyDateTimeColumn >= dbo.kk_fn_UTIL_DateRound(@dateStart, 0)
AND MyDateTimeColumn < dbo.kk_fn_UTIL_DateRound(@dateEnd, 1)

If you want to display dates, without the time, then do:

SELECT dbo.kk_fn_UTIL_DateRound(MyDateColumn, 0) AS [My Date]
FROM MyTable


--
PRINT 'Create function kk_fn_UTIL_DateRound'
GO
IF EXISTS (SELECT * FROM dbo.sysobjects WHERE id = object_id(N'[dbo].[kk_fn_UTIL_DateRound]') AND xtype IN (N'FN', N'IF', N'TF'))
DROP FUNCTION dbo.kk_fn_UTIL_DateRound
GO

CREATE FUNCTION dbo.kk_fn_UTIL_DateRound
(
@dtDatedatetime,-- Date Value to adjust
@intRoundint-- 0=Round down [Midnight last night], 1=Round up [Midnight tonight]
)
RETURNS datetime
/* WITH ENCRYPTION */
AS
/*
* kk_fn_UTIL_DateRoundConvert date to midnight tonight
*For a "limit" date of '01-Jan-2000' the test needs to be
*MyColumn < '02-Jan-2000'
*to catch any item with a time during 1st Jan
*
*SELECTdbo.kk_fn_UTIL_DateRound(GetDate(), 0)-- Midnight last night
*SELECTdbo.kk_fn_UTIL_DateRound(GetDate(), 1)-- Midnight tonight
*
* Returns:
*
* datetime
*
* HISTORY:
*
* 28-Jul-2005 KBM Started
*/
BEGIN

SELECT@dtDate = DATEADD(Day, DATEDIFF(Day, 0, @dtDate)+@intRound, 0)

RETURN @dtDate
/** TEST RIG

SELECT'01-Jan-2000', dbo.kk_fn_UTIL_DateRound('01-Jan-2000', 0)
SELECT'01-Jan-2000', dbo.kk_fn_UTIL_DateRound('01-Jan-2000', 1)

SELECT'01-Jan-2000 01:02:03', dbo.kk_fn_UTIL_DateRound('01-Jan-2000 01:02:03', 0)
SELECT'01-Jan-2000 01:02:03', dbo.kk_fn_UTIL_DateRound('01-Jan-2000 01:02:03', 1)

SELECT'28-Feb-2000 01:02:03', dbo.kk_fn_UTIL_DateRound('28-Feb-2000 01:02:03', 0)
SELECT'28-Feb-2000 01:02:03', dbo.kk_fn_UTIL_DateRound('28-Feb-2000 01:02:03', 1)

SELECT'29-Feb-2000 01:02:03', dbo.kk_fn_UTIL_DateRound('29-Feb-2000 01:02:03', 0)
SELECT'29-Feb-2000 01:02:03', dbo.kk_fn_UTIL_DateRound('29-Feb-2000 01:02:03', 1)

**/
--==================== kk_fn_UTIL_DateRound ====================--
END
GO
PRINT 'Create function kk_fn_UTIL_DateRound DONE'
GO
--

Kristen

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Mar 11, 2008



I converting DB2 date thru SQL server linked server. The datetime information is select from the DB2 correctly, but when I convert it to a datetime via a SQL function that I wrote, the milliseconds on the converted date are incorrect. The last digiti arbitrarily rounds up/down or does not round at all. I select the dates as a varchar from DB2 and string manipulate the Date field to correctly format the data, perform the convert function and presto the date is incorrect. Here is a code snippet I run on Query analyzer to get the resulse in question.



declare @datestring varchar(50)

declare @date varchar(10)

declare @time varchar(12)

declare @check as varchar(4)

declare @hold as varchar(4)

declare @int as integer

set @datestring = '1995-11-10-09.34.29.465123'

if len(@datestring) > 10

begin

set @datestring = substring(@datestring,1,len(@datestring)-3)

set @date = substring(@datestring,1,10)

set @time = replace(substring(@datestring,12,12),'.',':')



select @datestring, @date, @time,convert(datetime,@date + ' ' + @time)

end

else

select convert(datetime,@datestring)


Resulsts are as follows:
1995-11-10-09.34.29.465 1995-11-10 09:34:29:465 1995-11-10 09:34:29.467




Anyone have any idea what is going happening or any suggestions to correct this?

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Jan 28, 2008

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Dec 14, 2005

After testing out the application i write on the local pc. I deploy it to the webserver to test it out. I get this error.

System.Data.SqlClient.SqlException: The conversion of a char data type to a
datetime data type resulted in an out-of-range datetime value.

Notes: all pages that have this error either has a repeater or datagrid which load data when page loading.

At first I thought the problem is with the date, but then I can see
that some other pages that has datagrid ( that has a date field) work
just fine.

anyone having this problem before?? hopefully you guys can help.

Thanks,

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Apr 19, 2008

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Hi all,

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Hi,
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 '31/08/2006 23:28:59'
 I get the error "...datetime data type resulted in an out-of-range datetime value"
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cheers,
Ernest

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Hello!



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Jul 23, 2005

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May 13, 2008

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Imports system.web.configuration

Partial Class Admin_emag_insert
Inherits System.Web.UI.Page

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
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End Sub

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End Sub

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Dim objDataCommand As SqlCommand
Dim ConnectionString As String
Dim record_date As Date
Dim version As String
Dim emagSQL As String

'save form values in variables
record_date = Record_DateTextBox.Text
version = VersionTextBox.Text

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'Create and open the connection
objConnection = New SqlConnection(ConnectionString)
objConnection.Open()
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'Create and execute the command
objDataCommand = New SqlCommand(emagSQL, objConnection)
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Me.VersionTextBox.Text = ""

End Sub
End Class
 

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Thanks

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Hello guys,

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Cheers,

Elton

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Hello guys,



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Cheers,



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