This seems like it should be really obvious, but how can I put a DateTime object into an MSSQL database? When I convert it to a string, it keeps adding "-7:00" at the end for the time zone offset and so the query isn't accepted. How can I fix this?
How are you trying to insert the DateTime into the database? If you're converting it to a string to be passed into a stored procedure (bad idea; better to use the date SQL type), then you should first convert all DateTime objects to UTC using the .net method ToUniversalTime. Once in UTC, the DateTime will have no timezone offset.
Assuming you are using C#, I would suggest the following:
SqlCommand cmd = new SqlCommand("INSERT INTO yourTable (dateTimeColumn) VALUES (#value)", connection);
cmd.Parameters.AddWithValue("#value", yourDateTimeObject);
cmd.ExecuteNonQuery();
This will work for inserting the value. If not, please post your code to show where the error is because that means that the datetime object you are getting your value from is passing in the data wrong.
Related
I have a database with date in DD-MM-YY and i would need it to convert to YYYY-MM-DD so it could be used for date manipulation? Does anyone have any idea how it could be done with sqlite query?
I know the comments say you solved your issue, but for the benefit of others coming across this...
It would depend on the type of database where your original DD-MM-YY date was stored as to how to grab it. It would not be SQLite, since SQLite stores it as YYYY-MM-DD HH:mm:ss (http://sqlite.org/lang_datefunc.html), as you said you needed. But let's say you have a C# application that can reach in and grab your original date as DateTime badDate:
string goodDateString = badDate.ToString("YYYY-MM-DD HH:mm:ss");
string sql = "INSERT INTO MySQLiteTable (MyDateColumn) VALUES ('" + goodDateString + "')";
And then you use that sql with a SQLiteCommand and your connection string (path to your SQLite DB) to update SQLite.
I have a textbox which displays the date as 01-May-2011 but the database coumis in format of datetime ... how to enter date in date time column of database. ..
how to wite the sqlquery for this ?
You can convert that format to a DateTime like this
string dateString = "01-May-2011";
string format = "dd-MMM-yyyy";
var result = DateTime.ParseExact(dateString, format, CultureInfo.InvariantCulture);
if you're using LINQ to SQL or even ADO with a parameter of type DateTime, the conversion to a format that SQL understands will be done automatically for you.
If you're building the SQL by concatenating a string manually (not recommended!) you should try to reconvert to a string in the format 'yyyyMMdddd' (corrected as per AdaTheDev's comment, notice the single quotes). Other formats may or may not be recognized by sql depending on the language settings on both your client and your SQL Server
SQL Server is pretty good about taking in datetime values. If you pass the date as a parameter you can put quotes around it ('01-May-2011') and ignore the time. The database will automatically fill in a default time so that you don't have to worry about it.
Pass field value as nvarchar to database and use following to cast it to datetime.
Declare #dt nvarchar(20)
SET #dt = '01-May-2011'
select cast(#dt as datetime)
One thing to be aware of is that dates w/o time will be interpreted as May 1 2011 12AM. IE, without a time specified, SQL Server will always set the time to midnight. So if you have just the date as a field and you want records from May 1, you can't do
WHERE datefield = '5/1/2011'
This will find records where the datefield is May 1st Midnight. You have to do
WHERE datefield >= '5/1/2011' and datefield < '5/2/2011'
This doesn't really pertain to your question, but I've seen it trip up a LOT of people. Myself included.
Just convert it to dateTime
DateTime _ConvertedDate = Convert.ToDateTime(txtDate.Text);
this converts into datetime
I'm using MS SQL 2000, VS2008, MVC and C#.
I'm trying to insert and update some data using stored procedures.
Some columns are of type datetime.
Regional settings on both server and client are set to Dutch (Belgium)
This means the default date format is dd/mm/yyyy.
When i try to insert or update with a date of eg. 28/03/2009, I get following errors:
Insert:
Error converting data type nvarchar to datetime
Update:
The conversion of a char data type to a datetime data type resulted in an out-of-range datetime value
When I try with a date like 01/03/2009, I get no errors but the date is saved as 03/01/2009, which is the US date format.
This is typical behaviour for problems with regional settings. But both are set to Dutch (Belgium).
Why does it save dates in the US format?
What am i missing here?
Thanks!
Stijn
You should be inserting data into the database using a DateTime object, not a string. Your client-side code should convert the client's date entry to a DateTime object using the client's regional settings, then the DateTime struct should be added to the parameter that is ultimately sent into the database.
The SQL Instance has it's own locale setting, by default "us_english"
Now, this usually happens if you pushing using varchar rather than native datetime to store data values. If your code/tables use datetime columns and you define parameters as datetime then you won't get errors.
i had this problem too, its something to do with the date format for you SQL server,
i solved it by formatting the date string to be inserted like so
DateTime.Now.ToString("MM/dd/yyyy HH:mm")
hope that helps
All above suggestions are correct but I find if you are adding a datetime as a string/varchar the safest way is in the format 'YYYY-MM-DD'
So eg.
Update MyTable
Set MyDate = '2010-03-01'
I have an application in asp.net which worked fine untill recently when i changed the datetime format in Regional and Language Settings in Control Panel.
The date time format was default when i installed XP. I chose Indian standard time while installing XP.
I changed the date time format to dd/MM/yyyy HH:mm:ss. And my application started to throw an exception whenever i tried to insert any datetime in to the table.
The exception i get is:
System.Data.SqlClient.SqlException: Error converting data type varchar to datetime.
Please help me on this
Hard to know exactly what's going on without seeing the code that's throwing. However, if you need to communicate dates to SQL Server, it is generally good practice to use the ISO 8601 standard for representation because it is unambiguous and locale-independent. The most important formats are:
yyyy-MM-dd for dates
hh:mm:ss for time
yyyy-MM-dd hh:mm:ss for date/time
My guess is that you have a query that's sending over dates in the current locale, and the locale on the server does not match.
Edit: And for the record, this doesn't preclude anything that Rob said in his answer, i.e. try to avoid passing hard-coded dates or hard-coded SQL at all. This only applies if you need to for some reason.
Edit 2: I've been informed that the yyyy-MM-dd format can still be wrong for some locales; so instead of this, if you need to pass in a literal date string, you should instead use yyyyMMdd.
As per my comment, you'll probably want to make sure you're using code that behaves in a similar way to the code below (i.e. using parameters rather than string concatenation)
var myConnectionString = "connection string goes here";
var myDateValue = DateTime.Now;
using (var connection = new SqlConnection(myConnectionString))
{
using (var command = new SqlCommand("SELECT COUNT(1) FROM dbo.table WHERE datecolumn = #datevalue", connection))
{
var dateValueParameter = new SqlParameter("#datevalue", myDateValue);
command.Parameters.Add(dateValueParameter);
var result = Convert.ToInt32(command.ExecuteScalar());
}
}
Try adding "Current Language=YourLanguage" to the SQL server connection string. Where YourLanguage is the language you want SQL to use when reading values such as the dates.
You can see a list of all languages supported by SQL by executing the following SQL command:
select * from master.dbo.syslanguages
I am trying do a database update via stored procedure using ADO.NET.
Basically i setup all the parameter and command and have the one of the parameter set like the following
DbParameter nm8 = provider.CreateParameter();
nm8.ParameterName = "#EDITDATE";
nm8.DbType = System.Data.DbType.DateTime;
nm8.Value = aObject.ADateTime;
command.Parameters.Add(nm8);
In the stored procedure, the input parameter is defined as
#EDITDATE datetime = null,
and basically what the stored proc does is just get a record and update it with the EDITDATE passed in.
but i am getting this error
Error converting data type varchar to datetime.
and what i found was that the datetime value is passed in to the stored procedure as something like the following
2010-02-03 15:26:54.3100000
instead of
2010-02-03 15:26:54.310
and i think that's what is causing the casting error.
so my question is why ado.net convert the datetime in that format?
how can I resolve the issue without passing the value in as string.
thanks a lot.
Certainly this throws an error in SQL Server 2005:
print cast('2010-02-03 15:26:54.3100000' as datetime)
whereas this works fine:
print cast('2010-02-03 15:26:54.31' as datetime)
But ... is aObject.ADateTime not of type DateTime? It sounds like it's being passed to the stored procedure as a string.
If it is indeed a string, I would suggest converting it to DateTime before you pass it in:
nm8.Value = DateTime.Parse(aObject.ADateTime);
Do you have to program against the base class or can you use SqlParameter? (assuming you are using connecting to Sql Server) Maybe you can try setting the SqlDbType property
SqlParameter sqlParam = (SqlParameter)nm8; //check if it's compatible before casting.
sqlParam.SqlDbType = SqlDbType.DateTime