Question

Insert a date into a SQL server 2008 datetime field

Asked by: TrilobyteMKR

Hi,
I'm fairly new to Visual Studio 2008 and I'm sure that this question has been answered before, but I just can't seem to get a solution that works. I've taken data from a .csv file and I'm trying to store the date into a sql table in VB.net. into a datetime field.

I'm in the UK so the dates are dd/mm/yyyy

Simplified the code is
dim mysql as string
mysql = "Insert into mytable(MyID, MyDate) values ('" & mydata(0).tostring & ",'" & mydate &"')"

This becomes
Insert into mytable(MyID, MyDate) values ('378549', '27/07/2009')

I get the error message
The conversion of a varchar data type to a datetime data type resulted in an out-of-range value. The statement has been terminated.

I need to know exactly what I should be putting into my SQLstring so that VB can pass this successfulyy to SQL. Can anyone help.
Thanks

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Asked On
2009-09-09 at 08:25:00ID24718457
Tags

sql server 2008 vb.net visual studio 2008

Topics

SQL Server 2008

,

Visual Studio

,

Microsoft Visual Basic.Net

Participating Experts
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Comments
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Answers

 

by: aneeshattingalPosted on 2009-09-09 at 08:27:02ID: 25292274

Insert into mytable(MyID, MyDate) SELECT '378549', CONVERT(datetime,  '27/07/2009' ,103 )

 

by: aneeshattingalPosted on 2009-09-09 at 08:27:42ID: 25292286

if possible, always try to pass the date in YYYYmmDD format

 

by: TrilobyteMKRPosted on 2009-09-09 at 09:11:09ID: 25292738

so does the statement become

 Insert into mytable(MyID, MyDate) SELECT '378549', CONVERT(datetime,  '27/07/2009' ,103 )
 because neither the date  nor the id number are literals they are both supplied from data fields.

so would that be

Insert into mytable(MyID, MyDate) SELECT myID, CONVERT(datetime,  mydate ,103 )

or would I have to be adding quotes / apostropes around the fields?

 

by: aneeshattingalPosted on 2009-09-09 at 09:17:55ID: 25292813

since they are supplied thru data fields, i dont think you need quotes around them, you can try withiut them first in case it gives the error u can put quotes

 

by: TrilobyteMKRPosted on 2009-09-09 at 09:30:23ID: 25292940

I think we're making progress, but what happens if the value of the date coming from the .csv file is null or empty, what should I store in sql to stop the system crashing if it tries to store a null value into a datetime field?
m

 

by: wiljePosted on 2009-09-09 at 14:57:06ID: 25295957

Instead of concatenating the string to be executed (bad form, can lead to SQL Injection issues), you should be using parameters and setting the parameters.

Because I am not a programmer - I don't recall the exact syntax, but basically you create the command with parameters, add the parameters to the collection - set the parameters and then execute.  When you do that, the parameters don't need to be in any specific format - they will be sent to SQL Server correctly as datetime data types.

 

by: wiljePosted on 2009-09-09 at 15:04:04ID: 25296006

Here is an article that you can review: http://weblogs.asp.net/bleroy/archive/2004/08/18/216861.aspx

And this: http://weblogs.asp.net/scottgu/archive/2006/09/30/Tip_2F00_Trick_3A00_-Guard-Against-SQL-Injection-Attacks.aspx

Essentially, what you want to do is define the parameter as a datetime - and then it won't matter what format you use, it should be passed correctly to SQL Server.

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