Dual ada table yang sudah disediakan oleh oracle dengan owner nya sys, 
bisa diakses oleh semua user.
Hanya memiliki satu column namanya dummy.

Untuk pengambilan time nya diparsing di vb nya.
contoh dari 
http://www.experts-exchange.com/Programming/Languages/Visual_Basic/Q_10333307.html,
 
sbb:

Function SysDate() As Variant
'*************************
************************************************************************************************
'   Retrieves the current date/time from the database server
'   Example call:
'       SQL = SQL + "SET LASTUPDATED = " & ToDate(SysDate())
'*************************************************************************************************************************
Dim sErrors As String
Dim sSQL As String
Dim vReturn As Variant
Dim lrs      As Recordset

    On Error GoTo SysDateErr
   
    SysDate = ""
    vReturn = ""
   
    sSQL = "SELECT SYSDATE AS SERVERDATE FROM DUAL"
   
    Set lrs = New ADODB.Recordset
    lrs.CacheSize = 100
    CN.CursorLocation = adUseServer
       
    lrs.Open sSQL, CN, adOpenForwardOnly, adLockReadOnly, adCmdText
   
    If Not lrs.BOF And Not lrs.EOF Then
        If Not IsNull(lrs("SERVERDATE")) Then
            If IsDate(lrs("SERVERDATE")) Then
                vReturn = Format(lrs("SERVERDATE"), "m/d/yyyy hh:nn:ss 
AM/PM")
            End If
        End If
    End If

    SysDate = vReturn
    lrs.Close
    Set lrs = Nothing

SysDateExit:
    Exit Function
SysDateErr:
    Screen.MousePointer = 0
    sErrors = "SysDate " & Err.Description
    frmMessage.MessageBox sErrors, vbCritical, Err & ""
    Resume SysDateExit
End Function

So, you're function call would be:
Set testParm = testCmd.CreateParameter("Time_Stamp", adDate, 
adParamInput, , SYSDATE())

wempy ali wrote:
> hallo wadi...
> aku udah coba dari SQL plus "select sysdate from dual;" dan berhasil 
> mendapatkan tanggal server.
> aku mau tanya dual itu mewakili/artinya apa ya?
>  dan untuk ambil time SQL nya apa ?
>  
> tks
>
> --- On Fri, 11/7/08, Wadi Achmed <[EMAIL PROTECTED]> wrote:
>
> From: Wadi Achmed <[EMAIL PROTECTED]>
> Subject: Re: [indo-oracle] Bgmn mengambil date dan time dari server2000 via 
> VISUAL BASIC 6.0
> To: [email protected]
> Date: Friday, November 7, 2008, 11:31 PM
>
> Hallo Wempy,
>
> select sysdate into datetime_variable  from dual;
>
> gunakan sql tersebut untuk mengambil date time server.
> Kalau di vb saya kurang jelas bagaimana menggunakan itu. Apakah bisa 
> embedded sql?
>
> Cheers,
> Wadi Achmed
>
> wempy ali wrote:
>   
>> hallo yen...
>> Sorry, mungkin subject dgn isi gak nyambung...krn gak sengaja ter sent.
>>  
>> aku malah bingung gimana nulis aplikasi systimestamp kalo di visual basic.
>> aku udah coba di SQLplus , tapi gak bisa...
>> tolong dong....
>>  
>>  
>> tks.
>>
>> --- On Fri, 11/7/08, Yenn Madyanto <[EMAIL PROTECTED]> wrote:
>>
>> From: Yenn Madyanto <[EMAIL PROTECTED]>
>> Subject: Re: [indo-oracle] Bgmn mengambil date dan time dari server2000
>>     
> via VISUAL BASIC 6.0
>   
>> To: [email protected]
>> Date: Friday, November 7, 2008, 6:36 AM
>>
>> subject ama pertanyaannya gak nyambung :)
>> kalo di oracle pake systimestamp aja,
>>
>> semoga membantu,
>>
>> YennM.
>>
>> On Fri, Nov 7, 2008 at 11:43 AM, wempy ali <[EMAIL PROTECTED]>
>>     
> wrote:
>   
>>   
>>     
>>>   halo teman2...
>>>            bgmn access time dan date dari database oracle? biar date
>>>       
> dan
>   
>>> time tidak perlu ikut client yg mungkin sering diubah2 oleh user.
>>>
>>> tks.
>>>
>>> wempy.
>>>
>>> [Non-text portions of this message have been removed]
>>>
>>>  
>>>
>>>     
>>>       
>> [Non-text portions of this message have been removed]
>>
>>
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>> -----------------------------------------------
>>
>> Bergabung dengan Indonesia Thin Client User Groups, 
>> Terminal Server, Citrix, New Moon Caneveral, di:
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>>
>>
>>
>>
>>
>>
>>       
>>
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>>
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>>
>>   
>>     
>
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> -----------------------------------------------
>
> Bergabung dengan Indonesia Thin Client User Groups, 
> Terminal Server, Citrix, New Moon Caneveral, di:
> http://indo-thin.blogspot.comYahoo! Groups Links
>
>
>
>
>
>
>       
>
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>
>
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> -----------------------------------------------
>
> Bergabung dengan Indonesia Thin Client User Groups, 
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>
>
>
>
>   

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