Query Data From A Different Database

Sep 13, 2007



Greetings,

Is it possible to create a view that selects data from a different database, SQL 2005?

i.e. Server A.Database 1.Table 1, Can Server B.Database 2.View1 be based on Server A.Database 1.Table 1

I thought I browsed by a page a few days ago that gave an example. Unfotunately I did not bookmark it.

Thank you,
Charles

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Query Data From The Linked Foxpro Database

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hello,guys,

my question is :
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more:
I have linked a visual foxpro server to my sql server database by using the addserver clause.
Two server is in a local network.
My linked foxpro server named 'fox'.
its datasourse is not a dbc file, but a directory of dbf files ,and its full path is d:foxpro object.
In the directory ,there are three table,'show2003.dbf','sysu.dbf','szszj.dbf'.
And the .dbf files are not in any database.
They are just three files in the same directory.
There is no dbc file.
Now I can see the table list on the right page of the linked server.
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sample:

select * from fox..sysu


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server: message 7313,level 16,status 1,row 1
the appointed constructure or directory to the provider is inefficacious 'MSDASQL'


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The problem is that variable is not valid in 'openquery' and 'openrowset'.
But I must use variable.
so ,please give me some advice.



Thank you very much

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===================================
Sequence contains no elements
------------------------------
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[code]....

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Hi all,
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USE [Northwind]

GO

/****** Object: StoredProcedure [dbo].[SalesByCategory] Script Date: 03/25/2008 08:31:09 ******/

SET ANSI_NULLS ON

GO

SET QUOTED_IDENTIFIER ON

GO

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@CategoryName nvarchar(15), @OrdYear nvarchar(4) = '1998'

AS

IF @OrdYear != '1996' AND @OrdYear != '1997' AND @OrdYear != '1998'

BEGIN

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END

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FROM [Order Details] OD, Orders O, Products P, Categories C

WHERE OD.OrderID = O.OrderID

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AND P.CategoryID = C.CategoryID

AND C.CategoryName = @CategoryName

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GROUP BY ProductName

ORDER BY ProductName

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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Imports System.Collections.Generic

Imports System.ComponentModel

Imports System.Drawing

Imports System.Text

Imports System.Windows.Forms

Imports System.Data

Imports System.Data.SqlClient

Imports System.Data.Common

Imports System.Diagnostics

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Dim _ProviderFactory As DbProviderFactory = SqlClientFactory.Instance

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' This call is required by the Windows Form Designer.

InitializeComponent()

' Add any initialization after the InitializeComponent() call.

'Force app to be available for SqlClient perf counting

Using cn As New SqlConnection()

End Using

InitializeMinSize()

InitializePerfCounters()

End Sub

Sub InitializeMinSize()

Me.MinimumSize = Me.Size

End Sub

Dim _SelectedConnection As DbConnection = Nothing

Sub lstConnections_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs) Handles lstConnections.SelectedIndexChanged

_SelectedConnection = DirectCast(lstConnections.SelectedItem, DbConnection)

EnableOrDisableButtons(_SelectedConnection)

End Sub

Sub DisableAllButtons()

btnAdd.Enabled = False

btnOpen.Enabled = False

btnQuery.Enabled = False

btnClose.Enabled = False

btnRemove.Enabled = False

btnClearPool.Enabled = False

btnClearAllPools.Enabled = False

End Sub

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btnAdd.Enabled = True

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btnOpen.Enabled = False

btnQuery.Enabled = False

btnClose.Enabled = False

btnRemove.Enabled = False

btnClearPool.Enabled = False

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End If

End If

btnClearAllPools.Enabled = True

End Sub

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Me.Cursor = Cursors.WaitCursor

DisableAllButtons()

End Sub

Sub EndWaitUI()

Me.Cursor = Cursors.Default

EnableOrDisableButtons(_SelectedConnection)

End Sub

Sub SetStatus(ByVal NewStatus As String)

RefreshPerfCounters()

Me.statusStrip.Items(0).Text = NewStatus

End Sub

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Return

End Try

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SetStatus("Ready")

Else

SetStatus("Operation cancelled")

End If

End Sub

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Dim blnError As Boolean = False

Dim strErrorMessage As String = ""

Dim strErrorCaption As String = "Connection attempt failed"

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cn.Open()

lstConnections.SelectedIndex = lstConnections.Items.Add(cn)

Catch ex As Exception

blnError = True

strErrorMessage = ex.Message

End Try

EndWaitUI()

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SetStatus(strErrorCaption)

MessageBox.Show(strErrorMessage, strErrorCaption, MessageBoxButtons.OK, MessageBoxIcon.Error)

Else

SetStatus("Connection opened succesfully")

End If

End Sub

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StartWaitUI()

Try

_SelectedConnection.Open()

EnableOrDisableButtons(_SelectedConnection)

SetStatus("Connection opened succesfully")

EndWaitUI()

Catch ex As Exception

EndWaitUI()

Dim strErrorCaption As String = "Connection attempt failed"

SetStatus(strErrorCaption)

MessageBox.Show(ex.Message, strErrorCaption, MessageBoxButtons.OK, MessageBoxIcon.Error)

End Try

End Sub

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If queryDialog.ShowDialog() = System.Windows.Forms.DialogResult.OK Then

Me.Cursor = Cursors.WaitCursor

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Try

Dim cmd As DbCommand = _SelectedConnection.CreateCommand()

cmd.CommandText = queryDialog.txtQuery.Text

Using rdr As DbDataReader = cmd.ExecuteReader()

If rdr.HasRows Then

Dim resultsForm As New QueryResultsForm()

resultsForm.ShowResults(cmd.CommandText, rdr)

SetStatus(String.Format("Query returned {0} row(s)", resultsForm.RowsReturned))

Else

SetStatus(String.Format("Query affected {0} row(s)", rdr.RecordsAffected))

End If

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EnableOrDisableButtons(_SelectedConnection)

End Using

Catch ex As Exception

Me.Cursor = Cursors.Default

EnableOrDisableButtons(_SelectedConnection)

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SetStatus(strErrorCaption)

MessageBox.Show(ex.Message, strErrorCaption, MessageBoxButtons.OK, MessageBoxIcon.Error)

End Try

Else

SetStatus("Operation cancelled")

End If

End Sub
///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
I executed the code successfully and I got a box which asked for "Enter the query string".
I typed in the following: EXEC dbo.SalesByCategory @Seafood. I got the following box: Query attempt failed. Must declare the scalar variable "@Seafood". I am learning how to enter the string for the "SQL query programed in the subQuery_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btnQuery.Click" (see the code statements listed above). Please help and tell me what I missed and what I should put into the query string to get the information of the "Seafood" category out.

Thanks in advance,
Scott Chang

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I drag a datagrid on the page and only changed its Id.
Into the SQL database the stored procedure is the following:
ALTER PROCEDURE [dbo].[Ver_Contactos_Reducido]
(@Valor VARCHAR(100))
AS
BEGIN
SET NOCOUNT ON;
SELECT NombreRazonSocial, Nombre, Apellido,TelefonoLaboral,
Interno, TelefonoCelular, Email1, Organizacion
FROM CONTACTOS
WHERE NombreRazonSocial = @Valor OR Nombre = @Valor OR Apellido = @Valor OR  TelefonoLaboral = @Valor OR Interno = @Valor OR
TelefonoCelular =@Valor OR Email1 = @Valor OR Organizacion= @Valor
END
When i run the page i can't see the datagrid, and after i enter a text and press the button, nothing happens. What am i doing wrong??
Thks!!

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