How Do You Compare Date Values

Aug 2, 2004

I'm stuck trying to compare date values from users selection against a database. I also need to add a condition statement on if the results return no match. How would I do that?





Also, I'm not even sure if my SELECT statement is right. The user will hit a date that will be in format m/d/yyyy and that will be compared to see if it exist in the database. The datebase column "date_created" is default with date/time( 8 ). But when I compare the to together, nothing returns back. The page loads successfully, but no results from the database.





Here is my code:


dim conpubs as sqlconnection


dim cmdSelectAuthors as sqlcommand


dim dtrAuthors As sqlreader





conpubs = New sqlconnection(configurationsettings.appSettings("STD"))


conpubs.open()


cmdSelectAuthors = New sqlcommand("Select * From HotNews WHERE date_created=" & y, conpubs)


dtrAuthors = cmdSelectAuthors.ExecuteReader()


Response.Write("<table><tr><td>")





While dtrAuthors.Read()


Response.Write(dtrAuthors("title") & "<br>")


End While





Response.Write("</td></tr></table>")





dtrAuthors.close()


conPubs.close()

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How Do You Compare Date Values

Aug 2, 2004

I'm stuck trying to compare date values from users selection against a database. I also need to add a condition statement on if the results return no match. How would I do that?

Also, I'm not even sure if my SELECT statement is right. The user will hit a date that will be in format m/d/yyyy and that will be compared to see if it exist in the database. The datebase column "date_created" is default with date/time( 8 ). But when I compare the to together, nothing returns back. The page loads successfully, but no results from the database.

Here is my code:
dim conpubs as sqlconnection
dim cmdSelectAuthors as sqlcommand
dim dtrAuthors As sqlreader

conpubs = New sqlconnection(configurationsettings.appSettings("STD"))
conpubs.open()
cmdSelectAuthors = New sqlcommand("Select * From HotNews WHERE date_created=" & y, conpubs)
dtrAuthors = cmdSelectAuthors.ExecuteReader()
Response.Write("<table><tr><td>")

While dtrAuthors.Read()
Response.Write(dtrAuthors("title") & "<br>")
End While

Response.Write("</td></tr></table>")

dtrAuthors.close()
conPubs.close()

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Dec 14, 2012

I have a scenario where I need to compare a single DateTime field in a stored procedure against multiple values passed into the proc.So I was thinking I could pass in the DateTime values into the stored procedure with a User Defined Table type ... and then in the stored procedure I would need to run through that table of values and compare against the CreatedWhenUTC value.I could have the following queries for example:

WHERE CreatedWhenUTC <= dateValue1 OR CreatedWhenUTC <= dateValue2 OR CreatedWhenUTC <= dateValue 3

The <= is determined by another operator param passed in. So the query could also be:

WHERE CreatedWhenUTC > dateValue1 OR CreatedWhenUTC > dateValue2 OR CreateWhenUTC > dateValue3 OR CreateWhenUTC > dateValue4

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Jan 23, 2008

Hi All,

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Basically the algorithm is like this, if the input file row is not existed in the database then treat that as new row else if the input row is existed in the database then check all the columns are equal or not. If all the columns are equal then treat that as existing row and do nothing else if some columns are not equal then treat this row seperately.

I found some thing to achieve the above thing.
1. Take the input row and check in the database.
2. If the row is not found in the database then treat it as new row.
3. If row is found in the database then
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b) Take the database row and prepare a concatenated string for all the columns
c) Find out the hash code for the 2 strings and then compare hash codes for equal.

The disadvantage of this is running a loop 2*m*n times where m is the number of rows and n is the number of columns. It should be done 2 times for input file row and database row.

Can anybody suggest a good method to do this?

What does the function "GetHashCode" for InputBuffer in method "Public Overrides Sub Input0_ProcessInputRow(ByVal Row As Input0Buffer)" will do?
Will it generates hash code based on all the columns values?

Pls clarify.

Regards
Venkat.

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Nov 15, 2007

Hi, I really need this help urgently.
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Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load, Me.Load
con1.Open()
Dim cmd As New SqlCommand
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'Set the connect the command object should use
cmd.Connection = con1Dim da As New SqlDataAdapter(cmd)Dim ds As New DataSet
da.Fill(ds)
con1.Close()
If Not ds.Tables(0) Is Nothing ThenIf ds.Tables(0).Rows.Count > 0 Then
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objEmail.From = New MailAddress("my@email.com.sg")objEmail.To.Add(New MailAddress("my@email.com.sg"))
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objEmail.Priority = MailPriority.Normal
Dim SmtpMail As New SmtpClient("servername")
SmtpMail.Send(objEmail)
End If
End If
End Sub
Note: I am veri sure that database has the data field dueDate with the value 11/16/2007 smalltimedate(mm/dd/yyyy)
Realli veri urgent Thanks so much for ur'll help

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I need to do the following and am hoping someone can help me out.
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If @BeginDate < TodaysDate
The difficult part is how to obtain the value for "TodaysDate"
Taking into consideration that "TodaysDate" should probably be in the format of YY/MM/DD considering that is how the date it is to be compared with is being passed in.
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hello there,

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cheers
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hello there,

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cheers
zolf

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guys this is kind of a biggie for me.
i've only used sql server to compare the Date Portion of date(s), not the whole string (mm/dd/yyyy hh:mi).
i have a table called Time_Check which has two fields with timestamps,
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Create Procedure dbo.My_Time_Check
@myDate smalldatetime
as
select alertnumber,alertname,TimeLastRun,TimeNextRun
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thanks again
this forum is the best
rik

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well i actually get the answers by doin this...
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Hi

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--------
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ccc@yahoo.com

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aaa@yahoo.com
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---table with items

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[code]....

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Hi



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