Select date from a datetime column

Well yeah as the topic says, this is my sql question right now;

string date = "2006-11-12";
string sql = "SELECT * FROM spell_of_work WHERE date='{0}'",date);

problem is that my date column in the table is datetime and not a date so.. error!

i dont know if RLIKE or LIKE can help,

 wating for a reply!

12/16/2006 6:27:21 PM 29906 articles. 0 followers. Follow

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SELECT * FROM spell_of_work WHERE date=' " & date & " ' "

I put spaces in between the quotes, so they could be seen better - you don't want to put those spaces there.

David Wier
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12/16/2006 6:56:31 PM

string monday = "2006-12-19";

string sql = "SELECT * FROM spell_of_work WHERE date='" & monday & "'";

i get following error:

Error    1    Operator '&' cannot be applied to operands of type 'string' and 'string'




12/19/2006 8:08:50 PM

You are designating monday as a string - in your database, it's looking for a date -


string datetime=........

David Wier
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12/19/2006 9:09:55 PM

hmm, how do u mean?

 string monday = "2006-12-16";

 string sql Datetime = "SELECT id,started FROM spell_of_work WHERE started='" &monday& "'";



12/19/2006 9:26:06 PM
PLease use parameterized queries:
string sql Datetime = "SELECT id,started FROM spell_of_work WHERE started=@started;
Besides preventing SQL injection attacks, your code looks cleaner and you dont have to worry about where/how to put spaces/quotes etc.

Dinakar Nethi
Life is short. Enjoy it.
12/19/2006 9:41:46 PM

well ok thanks but that didnt solve my problem


still, u cant do string sql Datetime = "";

wonder how he ment.



12/19/2006 10:23:58 PM

This is how you would do it in VB:

dim sql as string="SELECT * FROM spell_of_work WHERE date>=CAST(floor(CAST(@date AS float)) as datetime) AND date<CAST(floor(CAST(@date AS float))+1 AS datetime)"

dim conn as new sqlconnection(ConfigurationManager.ConnectionStrings("ConnectString").ConnectString)

dim cmd as new sqlcommand(sql,conn)





12/19/2006 10:47:05 PM
bah dont work, working with c# hehe
12/19/2006 11:06:17 PM

They are right - parameterized queries are the way to go - however, what I was talking about before was:

instead of:
string monday = "2006-12-16";
datetime monday  = "2006-12-16";

However, - here, note that since the system may see that as a specific DAY, I would recommend using something else - even adding an extra letter or two at the beginning, like:
datetime dtmonday  = "2006-12-16";

Then -
string sql = "SELECT * FROM spell_of_work WHERE date='" & dtmonday & "'";

 Do check out parameterized queries - I know I have a 2 part tutorial on it, though the core of the example code is VB ( This will tell you most of what you need to know about what it does, how to use it and why it's better.

David Wier
MCP/ASPInsider - where to look first!
Control Grouper - easily control properties for multiple controls with one control!
Calendar Express - The Best HTML Calendar Generator on the web!
(Please 'Mark as Answer' when it applies)
12/19/2006 11:36:46 PM

Well im having a function that get the first day of the week looks like this:


        int iWeek = week;
        int iYear = year;

        DateTime dtDate = DateTime.Parse("01/01/" + year.ToString());
        dtDate = dtDate.AddDays(7 * iWeek);

        while (dtDate.DayOfWeek != DayOfWeek.Monday)
            dtDate = dtDate.AddDays(1);

        string strMonday = dtDate.ToString("yyyy/MM/dd");

        DateTime dtMonday = Convert.ToDateTime(strMonday);

        string sql = "SELECT * FROM spell_of_work WHERE date='" & dtMonday & "'";


that should help u guys more,

12/20/2006 12:17:03 AM
and up we go!
12/20/2006 7:57:02 PM

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