Linked Server Over Internet Using SQL Server 2005

Jan 15, 2008



Hi All you good people there...

Need a big favour.
I am working on a Linked Server using SQL server 2005.
My present requirement is that I need to have distributed qurey which will fetch data from out of LAN Sql Server databases.
I need to know these things at earliest.
1. How to expose SQL server (may be data or instance itself) over internet?
2. How can I add this internet exposed SQL server as a Linked server on my local SQL server?
3. How to prevent my exposed SQL server data from hackers, as I need it only for SQL to SQL interaction?

Any help is appreciated.
Are there any good sites/links to refer??


Thanks in advance.

Gauri Shenolikar

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SQL Server 2005 And Security Over The Internet

Feb 2, 2008


Couple of questions for the SQL Server Guru's out there.

SQLServer 2005
Web Hosting Provider

Ok I am developing a Web application in ASP.NET with AJAX, etc. etc. It will be some time before it is ready to roll out. As a mockup I created the same application in Microsoft Access and Visual Basic (VS 2008), which I can link the tables to the hosting provider on the internet. Works very well and speed is very acceptable. The want to start utilizing it with the mockup distributed app that I created.

My question is, is how secure is the data that is moving from the local application to SQLServer 2005 with the web hosting provider ? Is there anything that I can do to increase security ?

Thanks, any thoughts ?

Appreciate any suggestions or comments.

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Sql Server 2005 Access Though Internet

Feb 18, 2007

How can I access my Microsoft SQL Server 2005 through internet?

For example, I set up a Microsoft SQL Server in one of computers of my company, and every computer in my company has its own IP .They are in the same workgroup. Now, there is no problem with database access with another computer in my company.

Can anyone tell my how to access it through a computer out of my company?

Thanks

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SQL Server 2005 Express Database On The Internet

Jul 12, 2006

Hey all!I am hoping that somebody will be able to help me getting my database working over the Internet.I am using VS 2005 and SQL Server 2005 Express Edition and have my database set up within a web site project in VS under the App_Data folder.Everything runs smoothly when running the application on localhost I am just facing a problem when I attempt the same thing after uploading my pages to my web server.I am receiving the following error:An error has occurred while establishing a connection to
the server.  When connecting to SQL Server 2005, this failure may be
caused by the fact that under the default settings SQL Server does not
allow remote connections. (provider: SQL Network Interfaces, error: 26
- Error Locating Server/Instance Specified)I have tried enabling the disabled SQLEXPRESS protocols and disabled my firewall with no luck.I have also looked into using localhostsqlexpress as the server name but I dont see how this method would work as it appears to only run a database on the local machine which is the problem I have currently.Could anybody help me with this problem? I have only just started trying to use SQL Server Express as a means of database connectivity and I am not exactly sure how it all works.Thanks

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Connection Sql Server Express 2005 Over Internet ?

May 24, 2007

Is it possible to connect to a sql server express over internet or not ?

- I am using a win2003 sp1 server. Freshly installed.
- The server is directly connected to internet.
- For the purpose of the test, I stopped the windows firewall and the IPSec service.
- I stopped SQL server Browser service.
- I find a free port (here : 1401)
- I activated TCP/IP protocol in SQL Server Configuration Manager, and I have selected 1401 as the TCP port in the IPAll sextion of TCP/IP protection (and I remove the '0' of the dynamic TCP Port).
- Restarted SQL server express...

In the sql server log, I get the message "Serveur Server is listening on [ 'any' <ipv4> 1401]"

But I never get an answer from the server.

sqlcmd -S ip_of_the_server, 1401 -U username -P password is working fine if launched on the server. But I always get a timeout error from any PC. Same with a telnet on port 1401.

Any idea ?



-

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Jul 12, 2007

Hi!I am trying to connect to my SqlServer 2005 thru internet, but it is notworking. I have a dyndns updater on my server which tells me an ip addressof the router. The router is configured to forward TCP port 1433 to LAN IPaddress of the computer on which is SQL Server installation.What is the connection string to connect to my server.I tried xxx.dyndns.org:1433, but it doesn't work. There is a defaultinstance installed on that machine.Please help.Zvonko

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Sep 19, 2007

hi,

i am new to sql server reporting 2005. i can able to create reports and i can able to access in web pages. But my problem is, my reports and database are in one server, and my web server is differnet. we cant view the reports from internet. How can we slove this. any one can help?

Thanks in advance.

sns

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SQL Server 2005 Replication To Internet Provider (Hoster)

Feb 27, 2007

I have a question and bear with me because I am pretty new to this topic.

I have a SQL SERVER 2005 with a Client Server Application. Now I want to add a Webinterface. Sinice there is no infrastructure for hosting our own server. I want to go to an external hoster/provider.

Now my question is it possiple to replicate a snap-shot of the database to an web hoster?

If yes, what does my hosting package requieres beside SQL SERVER and ASP.NET. Any Services and open ports? What about Security?

When I replicate via push Service from my local SQL SERVER do I have to have a tunnel to the provider? Or external network access to my network via VPN. Or is there a way of doing it via HTTP? HTTPS? (I think I saw some settings about FTP replication...). Because of the Infrastructure Problems mentioned above...

It would be great if someone could give me closer information about this topic...

Links, Ressources, Tipps, Tricks, Tools... just anything... would be appriciated very much...

Thx.

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SQL Server 2005 Rejects Remote Internet Connections

Sep 27, 2007

PROBLEM:


SQL 2005 rejects connection from an ASP.net test webpage (shown below).

CONFIGURATION:

Internet > Concast Cable > Router > Sever01 Nic1 > Server01 SBS 2003 & SQL 2005 > Sever01 Nic2 > Switch > Local Area

Linksys Router WRV54G( Firmware Version: 2.39.2): Port Range Forwarding TCP 1433 and UDP 1434

Small Business Server 2003 Premium (Server Name: Server01)

Two network cards: Internet Ionnection and Local Area Network
Ran: Configure E-mail And Internet Connection Wizzard
Ran: Remote Access Wizzard (disables access to Windows Firewall)
Note: Remote workplace, Outlook Web Access, Sharepoint, etc, on ports 443,444, 3389, 4125 All work remotely - so Linksys router and RRAS port settings are working.

Routing And Remote Access(RRAS) >NAT/Basic Firewall > Internet Ionnection > Services And Ports

Added TCP Incoming Port 1433, Private Address 127.0.0.1, Outgoing Port 1433
Added UDP Incoming Port 1434, Private Address 127.0.0.1, Outgoing Port 1434

SQL Server 2005 Standard Edition version 9.0.3042 (installed on same machine, default instance ID MSSQLSERVER)

By default: TCP protocol is enabled and local remote connections are enabled on standard Edition. Also by default: MSSQLSERVER automatic/started/running and SQL Server Browser automatic/started/running

Ran: SQL Server 2005 Surface Area Configuration to confirm MSSQLSERVER instance settings are running.
Using: SQL Server Authentication: Login and Password
"sa" is a default account that works locally.


SQL Server Configuration Manager:

MSSQLSERVER protocols: Share Memory and TCP/IP enabled
TCP port 1433 by default (confirmed listening by ERRORLOG)


Microsoft SQL Server Management Studio

Database Engine lists SERVER01 (instead of SERVER01MSSQLSERVER - the default instance is not named explicitly)

Created database "Test" under SERVER01 > Databases.
Created table "tblCategories" in "Test" (included some fields and data)


Server-Side Successful?


netstat -ano | findstr 1433
TCP 0.0.0.0:1433 0.0.0.0:0 LISTENING 2004

Client-Side

Ping Successful

ping <xxx.xxx.xxx.xxx>
Telnet Successful (blank screen)

telnet <xxx.xxx.xxx.xxx> <port#>


TEST ASP.net Web Page Button Sub

I have this button on a page at Godaddy.com connecting to an instance of MS SQL provided by Godaddy and there is no problem connecting to that SQL Server.

Public Sub TestSQL_Click(Sender As Object, e As EventArgs)

Dim rdr As SqlDataReader = Nothing
Dim conn As SqlConnection = new SqlConnection("Data Source=tcp:xxx.xxx.xxx.xxx; Initial Catalog=Server01 blCategories; User ID=sa; Password=xxx")


conn.Open()

Dim cmd As SqlCommand = new SqlCommand("SELECT Category FROM tblCategories;", conn)
rdr = cmd.ExecuteReader()

rdr.Close()
conn.Close()
End Sub


ERROR:
The follworing error occurs or variations of it depending on different connection string configurations:

Occurs at: conn.Open()

An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: TCP Provider, error: 0 - A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.)


THOUGHTS

Possibly a bad connection string or Microsoft security issue.

I've attempted many other connection string formats such as:

Dim conn As SqlConnection = new SqlConnection("Data Source=xxx.xxx.xxx.xxx,1433;
Network Library=DBMSSOCN; Initial Catalog=Server01Test; User ID=sa; Password=xxx")


But I continue to receive connection failure messages (or invalid connection string errors for incorrectly formed connection strings).

I've tried disabling RRAS and Windows Firewall and the same errors resulted.

Any feedback would be appreciated.

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Jan 22, 2007

HI

Q1: Does Sql Server 2005 Express support Web/Internet to other SQL Server 2005 Express Clients or does it have to Synch across the internet to a fully installed setup SQL Server 2005 with IIS?

Q2: Does SQL Server 2005 Express support Direct Replication between other SQL Server 2005 Express clients?

Regards

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May 4, 2007

Hi
I have created a linked server from SQL Server 2005 (SP 1) to SQL Service 2000 (SP 4) with a sql server login that is available on both servers but with different passwords and permissions.



I am getting the following error while accessing the linked server in management studio based on the scenario given below ;



------ Error Message Starts
OLE DB provider "SQLNCLI" for linked server "(SQL Server 2000 instance name)" returned message "Communication link failure".
Msg 10054, Level 16, State 1, Line 0
TCP Provider: An existing connection was forcibly closed by the remote host.
Msg 18456, Level 14, State 1, Line 0
Login failed for user 'abc'.
------ Error Message Ends


Consider login name is abc.
Now this login abc has sysadmin rights on sql server 2005.
The same login abc has only db_datareader rights on sql server 2000 on just one database and is not associated with any fixed server role.

I have configured the linked server using the following options;
1. I have tried impersonating login from SQL Server 2005 to SQL Server 2000 .
2. I have also tried specifying remote login / password option.


Anyone having any idea, would be of great help.
Regards,
Salman Shehbaz.

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Apr 18, 2007

Can I connect from a SQL Server 2005 database to a SQL Server 2000 database, without establishing a linked server connection.



I need to fire a SELECT query on a SQL Server 2000 database, but don't want to add it as a linked server. Is there any way I can do this or its not possible??

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Dec 28, 2005

I have a Sybase Adaptive Server Enterprise server which I need to set up as a linked server in SQL Server 2005.  The Sybase server is version 12.5.2, and the Sybase ODBC driver version is 4.20.00.67.  I have already installed the Sybase client software on the server.


I also created a SystemDSN on the SQL Server to connect to the Sybase server.  I tested the connection and it was able to connect.

I ran the following code to create the linked server:

<code>

EXEC master.dbo.sp_addlinkedserver @server = N'LinkedServerName', @srvproduct=N'Sybase', @provider=N'MSDASQL', @datasrc=N'Sybase System DSN', @provstr=N'"Provider=Sybase.ASEOLEDBProvider;Server Name=servername,5000;Initial Catalog=databasename;User Id=username;Password=password"'

</code>

I then ran sp_tables_ex to make sure I could view the tables in the Sybase database.  Here is the error message I get:

<code>

OLE DB provider "MSDASQL" for linked server "LinkedServerName" returned message "[DataDirect][ODBC Sybase Wire Protocol driver]Error parsing connect string at offset 13. ".

Msg 7303, Level 16, State 1, Procedure sp_tables_ex, Line 41

Cannot initialize the data source object of OLE DB provider "MSDASQL" for linked server "LinkedServerName".

</code>

Any ideas what is happening here?

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Aug 30, 2006

I'm trying to link SQL Server 2000 sp3 to SQL 2005 64 bit. I keep getting Error 17 sql server does not exist or access denined. I tried adding remote user mapping and chaning the linked server properties to "Be made using this security context" without any success.
Any help is appreciated.

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Aug 27, 2007

I receive the following error message when I run a distributed query against a loopback linked server in SQL Server 2005:
The Microsoft Distributed Transaction Coordinator (MS DTC) has cancelled the distributed transaction.

To resolve this problem, I was told that running a distributed query against a loopback linked server is not supported in SQL Server 2005. And I am suggested to use a remote server definition (sp_addserver) instead of a linked server definition to resolve this problem. (Although this is only a temporary resolution, which will deprecate in Katmai)

However, I run into another problem when I use the remote server definition. I receive the following error message:
Msg 18483, Level 14, State 1, Line 1
Could not connect to server 'ServerNameSQL2005' because '' is not defined as a remote login at the server. Verify that you have specified the correct login name.

Could anyone please help me out?
(I include the reproduce steps for the first error message, followed by my resolution that generates the second error message)
======
Reproduce steps for the first error message
======


On the ComputerAInstanceA instance, run the following statement to create a database and a table:
CREATE DATABASE DatabaseA
GO
USE DatabaseA
GO
CREATE TABLE TestTable(Col1 int, Col2 varchar(50))
GO
INSERT INTO TestTable VALUES (1, 'Hello World')
GO

On the ComputerBInstanceB instance, run the following statement to create a database and a table:
CREATE DATABASE DatabaseB
GO
USE DatabaseB
GO
CREATE TABLE TestTable (Col1 int, Col2 varchar(50))
GO

On the ComputerAInstanceA instance, create a linked server that links to the ComputerBInstanceB instance. Assume the name of the linked server is LNK_ServerB.

On the ComputerBInstanceB instance, create a linked server that links to the ComputerAInstanceA instance. Assume the name of the linked server is LNK_ServerA.

On the ComputerBInstanceB instance, run the following statement:
USE DatabaseB
GO
CREATE PROCEDURE InsertA AS
BEGIN
SELECT * from LNK_ServerA.DatabaseA.dbo.TestTable
END
GO

On the ComputerAInstanceA instance, run the following statement:
USE DatabaseA
GO
INSERT INTO TestTable
EXEC LNK_ServerB.DatabaseB.dbo.InsertA
GO
Then I receive the first error message.

=======
My resolution that generates the second error message
=======


On the ComputerBInstanceB instance, run the following statement:
sp_addserver 'ComputerAInstanceA'
GO
sp_serveroption 'ComputerAInstanceA', 'Data Access', 'TRUE'
GO
USE DatabaseB
GO
CREATE PROCEDURE InsertA AS
BEGIN
SELECT * FROM [ComputerAInstanceA].DatabaseA.dbo.TestTable
END
GO

On the ComputerAInstanceA instance, run the following statement:
USE DatabaseA
GO
INSERT INTO TestTable
EXECUTE [ComputerBInstanceB].[DatabaseB].[dbo].[InsertA]
GO
Then I receive the second error message.

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Oct 4, 2007

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(http://support.microsoft.com/kb/306397/EN-US/)

Following the first 5 steps should let me acces the table (but I cannot view the data in SQL Server 2005). However, I could not find how to export the data into an existing table. Does anyone know how or can give a pointer to document describing how to do this?

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Jul 30, 2007

Hi,

I am using Windows 2003 server and Sqlserver 2005 by the use of Linked server , I made a connection to Oracle 10g after that I am importing records from Oracle to sqlserver 2005. When I made tnsnames.ora in sql machine , it worked fine but when i am using tnsnames file from oracle server then i fiired importing procedure it returns below maintain error :

OLE DB provider "MSDAORA" for linked server "BI_ORACLE_LS" returned message "Unspecified error".

OLE DB provider "MSDAORA" for linked server "BI_ORACLE_LS" returned message "Oracle error occurred, but error message could not be retrieved from Oracle.".

Msg 7311, Level 16, State 2, Line 1

Cannot obtain the schema rowset "DBSCHEMA_TABLES" for OLE DB provider "MSDAORA" for linked server "BI_ORACLE_LS". The provider supports the interface, but returns a failure code when it is used.


Please let me know.

Thanks

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Jan 16, 2008

Hello

SQL 2000: 8.00.2187 x86, 8 way 700mhz, 6GB Ram
SQL 2005: 9.00.3042 IA64 2 Way Dual-Core 1.66Mhz 16 GB ram

Symptoms

Querys to the SQL 2005 box from SQL 2000 work but when the query is parameterised with non-literals (@variables) then the query run on the SQL 2005 box excludes any where clause causing the entire table to be returned to the SQL 200 box. When the query is parameterised using literal values the query is executed on SQL 2005 including the where clause.

At first I thought that the "Collation Compatible" setting was the culprit but setting this to 1 made no difference. Other SQL 2000 boxes work as expected and any queries from these using literal and non-literal parameters.

Please, any ideas?



Working

SELECT A.Column FROM linkedServer.IA.dbo.Table Where A.Column = 'value'

Not Working (correctly anyway!)


DECALRE @Value tinyint
SET @Value = 22
SELECT A.Column FROM linkedServer.IA.dbo.Table Where A.Column = @value

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May 27, 2008

Hello,

I have a development and a production SQL server instance environment set up on 2 independent machines. Each machine is running Windows 2003 for an OS, while each server instance is version SQL Server 2005. On friday, I experienced difficulties querying one environment from the other through linked servers. I would get the error below:
.

Cannot obtain the schema rowset "DBSCHEMA_TABLES_INFO" for OLE DB provider "SQLNCLI" for linked server "dev_server". The provider supports the interface, but returns a failure code when it is used


The linked servers had been previously set up and had been running without any issues. Dropping and recreating the linked servers did not help at all, and all attempts to google the error led to accounts of either SQL Server 2005-SQL Server 2000 procedures compatibility or 64 bit - 32 bit compatibily related errors. Neither of the two were relevant as both my environment have the same technology, both hardware and software.

Mysteriously, the linked server worked this morning without any issue at all. One co-worker suggests gremlins are at work, while another figures that my set up had 'checked out for the long weekend'. Unfortunately, neither explanation is plausible, so my quest to find out what could have gone wrong, and hopefully put preventitive measures in place for the future goes on. Does anybody have any idea what the issue could have been?

Thanks,
Simba

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Feb 19, 2008

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Now i want to create same linked server with same provider in SQL server 2005 for Microsoft oledb for ODBC but they don't have this provider in 2005. How can i make it to work.ANy expert who knows this.

and how to use same password in linkedserver in 2005

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Jun 7, 2007

Dear Friends,

I am getting error when trying to make excel file as the linked server in my sql server the details are as under:



os: windows xp and also tried on windows server 2003

server: sql server 2005 sp2

excel: office 2003 and also tried with .xls file of office 2007



tried to add the remote as well as file on the same computer as linked server, but error was:



could not find installable ISAM and error no was 7303.



Please help me up.

I got the idea to make it as linked server from microsoft article and followed the neat steps and got the errors.

Thanks,

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Jan 14, 2008

Hi,

I created a linked server from SQL server 2005 (cluster) to SQL server 2000. When i try to execute the query from local server i get this error


OLE DB provider "SQLNCLI" for linked server "Rem_serv" returned message "Communication link failure".

Msg 10054, Level 16, State 1, Line 0

TCP Provider: An existing connection was forcibly closed by the remote host.

Msg 18456, Level 14, State 1, Line 0

Login failed for user 'rem_User'.


Please help



Thanks and regards

Helen

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How do you get the linked tables to display in the Linked Server folder?

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Hi,

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OLE DB provider "MSDASQL" for linked server "DB2TEST" returned message "[IBM][Client Access Express ODBC Driver (32-bit)]Driver not capable.".

Msg 7330, Level 16, State 2, Line 1

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I am using 'MSDASQL' which refers to the DSN setup on my machine using the ODBC "Client Access Driver 32-bit"

Strangely when I used the same DSN in SQL 2000 within the DTS package, I was able to connect and import data and worked like a charm.

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Dec 28, 2007

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@datasrc ='10.36.0.101',
@provider='IBMDA400',
@provstr='Initial Catalog=QGPL;CCSID=37;PCCodePage=1252'

But, it is not effective with IBM AS400 OLE Provider, It gets always time-out score.

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May 24, 2006

Hi,

We have been accessing databases on ASE 12.5 (on HPUX) from MS SQL Server 2000 (x32) successfully for years. We do this via linked servers we create on MS SQL Server. When creating the linked server, we would specify the Microsoft OLE Provider for ODBC as the provider, and the data source is the name of a DSN created with the Sybase ASE ODBC driver (4.20.00.67) that points the the HPUX box on which are the Sybase databases.

We have also gotten this to work just fine on MS SQL Server 2005 (x32) Standard Edition SP1. However, we cannot seem to get this to work on MS SQL Server 2005 (x64) Enterprise Edition SP1. The Microsoft OLE DB Provider is not available as an option when creating the linked server on MS SQL Server 2005 (x64). We have tried specifying the SQL Native Client as the provider, but this results in no connection being made and reports the following error:

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OLE DB provider "SQLNCLI" for linked server "GCMTESTSQLNATIVE" returned message "An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections.".

Msg 53, Level 16, State 1, Line 0

Named Pipes Provider: Could not open a connection to SQL Server [53].

Do we need to use a different ASE driver when accessing Sybase databases fom the MS SQL Server (x64) platform? Or is there a way to successfully create a linked server on MS SQL Server 2005 (x64) that can communicate with the 32-bit ASE ODBC driver?

Thanks,

Rocco M.

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Problem:
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Example (create a linked server on the same machine, other database (msdb) and try to execute any simple select using OPENQUERY
sp_addlinkedserver @server='ls',@srvproduct='SQLNCLI',@provider='SQLNCLI'
,@provstr='Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=msdb;Data Source=localhost;'
Select * from OPENQUERY(ls,'Select * from Sysobjects')
Msg 7356, Level 16, State 1, Line 1
The OLE DB provider "SQLNCLI" for linked server "ls" supplied inconsistent metadata for a column. The column "name" (compile-time ordinal 1) of object "Select * from Sysobjects" was reported to have a "Incomplete schema-error logic." of 0 at compile time and 0 at run time.

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Hi ,
On my Desktop i registered Production Server in Enterprise Manager
on that Server if i go to SecurityLinked Servers
There is another Server is already mapped, when i am trying to see the Tables under that one of the
Linked Server i am getting the Error message saying that
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if i went to Production Server location and if i try to see the tables i am able to see properly, no problems
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And i check the Client Network Utility in the Alias using Named Pipe only, i changed to TCP/IP still same problem
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The following is the code that I am using right now:

USE [master]
GO
EXEC master.dbo.sp_addlinkedserver
    @server = N'Machine123Instance456',
    @srvproduct=N'SQL Server' ;
GO
EXEC sp_addlinkedsrvlogin 'Machine123Instance456', 'false', NULL, 'username', 'password'  

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I have a script that has a LINKed server reference (see below) .

INSERT
INTO ACTDMSLINKED.ACTDMS.DBO.COILS ..etc.

ACTDMSLINKED does not exist at the time I need to add the stored procedure that references it.

PLEASE to not tell me to add the LINK and then run the script. This is not an option in this scenerio.

Thanks,

Terry

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