Accessing One Database From Multiple SQL Servers
Dec 1, 2006
Apologies if this question has been asked before. I am about to upgrade a multiuser application based on Access97 and VB6 to C# and possibly SQL Server Express.
My customer does not want to use a server based database solution ie a single instance of SQL Server, but prefers to have a common networked dataset which is accessed via user's own individual database engines. This is because of restrictions on the installation of server based apps.
Does this scenario completely rule out the use of SQL Server Express?
Thanks
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Sep 13, 2007
Hi,
I'm trying to create a database that takes specific information from a number of databases on different servers to make some reporting that we have much easier.
I'm pretty new to SQL so I'm not sure of the best way to proceed. I read an article that suggested I use the OPENROWSET command. The problem is, the version of SQL that came with one of the programmes we use is limited and will not allow you to turn on the allow "Ad Hoc distributed Queries" so the SLQ statement will not execute.
I'm confused why it won't let me to connect through ODBC as I've created a web page that selects data from this database with no problems!
Here is the SQL statement that I've written to make sure it is the correct one (on the msdn library page it said that this was the ODBC connection):
SELECT a.*
FROM OPENROWSET('MSDASQL','DRIVER=(SQL Server);SERVER=APPOLOACT7;UID=sa;PWD=***************',
'SELECT * FROM MDCTestAndDev.dbo.TBL_CONTACT') AS a
I've also created the ODBC connection using the tool on Administration Tools>Data Sources ODBC
Any help would be greatly appreciated (also any ways of selecting from one database and inserting it into another will be helpfull)
Thanks
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Aug 22, 2007
hi,
do i need to use specially synchronized code if i have multiple threads inserting, updating and reading rows to and from the same database?? in this case, i know that no 2 threads will try to insert or update the exact same row into the DB, however, multiple threads might try to read the same row from the database.
thanks!
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Nov 2, 2015
I currently use Access and have found that I need to migrate to SQL Server. I need setting it up.
Currently, I have multiple computers (home, office, laptop, etc.). On each of these computers, I have a folder which syncs via Dropbox. In this folder, I have my Access database which allows me to read/write to the Access database from any computer, and these changes are automatically synced to all the other computers via Dropbox.
I have installed the SQL Server database in the Dropbox folder then installed Management Studio on each computer. But only the computer which did the database install can link to the the SQL Server database. The other Management Studios cannot see the database.
Is there a way to achieve what I am after or is this a limitation of SQL Server? I do not want to have to manage a network or anything.
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Nov 14, 2000
Hello,
I am trying to create a trigger to update a table on a different database server. (Both databases are SQL server 7.0) Does anyone know the syntax of how to implement this?
Any help is appreciated!!
Thanks,
Lisa
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Apr 24, 2014
Scenerio : To keep a very large system running optimally in a VM cluster, Take PR01 and make PR02, PR03, PR04. Distribute the 45 databases and 9T+ of disk across multiple VM guest.
Each PR## is a SQL Server 2012 Enterprise guest on a VM 5.1 cluster.
So instead of PR01 needed 16 core and 128g of memory, each one will have 4 core and 32g of memory. Making VM HA more manageable. (yes, DRS rules will apply). Also provides more HBA paths and distributes i/o over more physical disk on the SAN.
Instead of a connection string having to know PR01.dbo.UserDB01, PR02.dbo.UserDB03, ect the connection would be PRDB.dbo.UserDB01. That way if needed 1) UserDB can be moved to any of the PR## 2) new PR05, PR06 can be added as needed. The end user and processes are not allowed to touch system databases, no PR## will have a user DB called the same name.
There are seperate VM guests on other VM clusters and Citrix servers that need access to PRDB. As things expand and move around, none of the connection strings need to be changed.
I am looking into RadWare and modifing level 7 information, but that is iffy and $$$$$$.
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Jun 22, 1998
We have installed SQL servers in 3 domains. We cannot see the servers in Enterprise manager in the other domains from any other domain. Trusted security is set up. Named pipes is the set protocol as we made no changes at install time. We can see the NT servers in the Server manager. All services are running. Is there something that I missed? Any help will appreciated.
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Jun 22, 1999
Hi,
I need to access data across my sql servers . All the servers are 6.5. Think MS DTC is the solution. But how to implement the same. Can somebody give me step by step instructions.
Thanks in Advance.
Cheers
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Oct 28, 2015
Is there a way to fetch database usage details for multiple SQL servers (report) usirng powershell script.
Details: servername, databasename, datafile usage, logfile usage, free % age...etc.
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Apr 30, 2007
Is there anyway to access system views on/from a linked server?
I have unsuccessfully tried various permutations of
select *
from [MDEDATAWTDss2005].master.[information_schema.colums]
Thanks
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Apr 26, 2006
I am having a problem accessing my local A: drive, using the bulk insert command. The actual sql server pc thinks I am accessing its sql server's A: and not my local a: drive. I am trying to read in a simple CSV delimited ascii file into a sql table. Wow what a nightmare just to read a simple ascii file into a table. Unfortunatley I am writing a program in VB.net for an operator to import ascii data from floppy diskettes.
I am using this command below: The command works fine but I have to go to the actual server and put the floppy disk in over there. I want the operator to be able to use there own A: or any location drive for that matter. Sql server over the network is not allowing us to access any local drive to import this data. I get an error 21 because the sql server does not have the floppy in its drive. It seems like some kind of security issue, but I am not sure. Any information would be most appreciated in this matter. Thanks in advance.
Sarah Diane Reid
sample code below:
BULK INSERT Master.dbo.imVBMbAddress
FROM 'a:mbAddressPipes.txt'
WITH (FORMATFILE = 'a:importdatambaddress.fmt',
FIRSTROW=2);
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Nov 22, 2007
Hello,
My next project(in VB.NET 2005) would involve accessing different DBs and tables in remote SQL servers
What are the steps that need to consider first? Are there any settings that needs to be done in the servers?
k
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Aug 8, 2006
I have several database files, all in the same directory. I want to write SQL statements that access two databases at once. For example, if only one database would be involved, I would write:
SELECT Test_Source_ID_column, Data_column
INTO Test_Destination_table
FROM Test_Sources_table
The above query copies two columns (Test_Source_ID_column and Data_column) from Test_Sources_table into a brand new table called Test_Destination_table.
Now the above query is fine for both the old and new tables being in the same database. But what if Test_Sources_table is in file Old.dbf and I want the new table Test_Destination_table to be in New.dbf?
Both Old.dbf and New.dbf are in the same directory. Therefore, there is no security issue about using ......etcpasswords. I should therefore be able to use relative paths. So, I also want to know how I can do that select on two databases in the same directory without typing long, long paths.
Is there a way to do queries that access multiple database files (all database files being in the exact same directory) AND use relative paths or no paths (and certainly not type a full path)?
NOTE 1: I'm using SQLEXPRESS, therefore do not have the SQL Server 2005 tools. I have Visual Studio 2005 Developer Edition with its tools.
NOTE 2: One table is accessed through ODBC. The other table is accessed through SQLEXPRESS.
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May 16, 2006
Hi ,
I have around 5 databases with same structure used to store data for different locations and services.
I have created an intermediate database which will have all the stored procedures to access data from above 5 databases.
My queries are common to all the databases. so,I would like to pass database name as an argument to my stored proc and execure query on specified database.
I tried this doing using "USE Databasename " Command. but it says ...We can not use "USE command " in stored proc or triggers. so ..what i did is ..
--------------------------------------------------------------------------------------------------------------
CREATE PROCEDURE TestDB_access(@dbname varchar(100))
AS
BEGIN
DECLARE @localDB varchar(100)
Set @LocalDB=@dbname
if @LocalDB='XYZ'
EXEC ('USE XYZ ')
elseif @LocalDB='ABC'
EXEC ('USE ABC')
Select * from Mytable
END
---------------------------------------------------------------------------------------------------------------
When I run this from my database , it gives me an error "unable to find table "mytable".
What is the best way to make my queries work with all the databases.
Thanks in advance
Venu Yankarla
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Dec 29, 2006
Seasons greetings to everyone,A simple question. Could someone show me the syntax to produce multiple (2 or 3) result sets in a stored proc and how you access those sets from a c# program (ASP.NET)..Couldn't find a reference on Google, maybe I was asking the wrong question! Thanks for any help regardsDavej
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Nov 8, 2015
We have a system that uses 3 databases, one for Membership db standard MS membership only the application has access to that data, one with User Data which we would like to make multi-tenant using Schema-Separation, and a third read-only reference db which is Common Market data for all users.we anticipate Tenant numbers in the thousands.Current we have multiple queries which create joins between the Main db and the Reference database using something like
Selec S.*, M.ScheduleDate, M.substation from Sites S left outer join Market.dbo.MarketUnit M where S.MarketUnitID = M.MarketUnitID
i'm planning to have a new schema for each Tenant on the Main Database, so I would create a Schema T1 for the first customer, a user T1User with access to T1 schema. and grant T1User access to Market.dbo. My First question is are there any concerns about the above T1User setup? My second question is, are there any tools which would automate the setup of the multi-tenant with schema separation, or should I just script the whole Main Database schema creation and replace schema name globally and then execute the script?
My Third question, how about upgrade and updates... currently using VS to compare dev/qa/prod database to identify changed which need to be promoted, and pushing updates... this could be a big pain to promote code to thousands of Schemas. grantedwe will likely keep the overall number of schemas spread over different SQL servers.
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Nov 15, 2007
Hi All,I have recently published a website to our webserver and i get a sql error. We have a webserver that does not have sqlserver on it and and our database server which does. i have used the configuration utility to to setup my users and roles which created the ASPNETDB in my local App_Data folder. Is there a way to copy this database to our database server and change the references so the site refers to the new instance on the database server as apposed to the local instance when a user logs in?ThanksBryan
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Mar 2, 2015
What's the easiest way to run the same db across multiple servers?
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Jun 3, 2008
hi
Is there a way to have a select query on multiple servers ? (2 databases , each one located on a sql server)
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Jul 12, 2000
suppose i am repliacting(Transactional Replication) to two servers using the same publications can i stop replicating to one server without disturbing the other server?
If i resume the replication to the server after two days what will happen to the two day's data?will they be replicated when i resume the replication?
Thank you
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Feb 6, 2001
Question:
How to prevent a user/admin on one SQL 7 server, who knows the system admin password that is common to both servers, from accessing a second SQL 7 server via the SQL Server Group setup process.
Is there a way from shutting off remote access to a SQL server without limiting RPC?
All reading points towards 1) Remote Access Options, 2) Store User Independent, 3) Control Store as options to locking down a server. Would like to hear from someone that ran into this type of issue. Third party software available?
I've tried the following without any success: 1) I have deleted the second SQL server registration from the first SQL server group - but this is too easy to delete and recreate, 2) edit the SQL server registration for the remote server and force authentication - almost there if SQL prevented deletion of the registration without verifying the logon/password of the person who created it (again able to delete and recreate), 3) played around with the client utility to remove the TCP/IP pipe entry.
Anyone else pulling their hair out on this?
TIA!
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Nov 12, 1999
Please excuse my niavety on this subject, But I have a simple question. When you have more than one SQl server 7 installation on the same network, each using different machines, does one automatically have the ability/authority to be able to stop the other server at will??
Thanks in advance for any help
Simon
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Mar 12, 2007
Joe writes "I am trying to find whether I can have multiple SQL 2005 servers but having same security profiles and maintain them grom one place only. I prefer not to have windows authentication.
Thanks a lot"
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Apr 13, 2007
I'm sort of new at MS SQL Server - I'm trying to gather system table information from multiple servers about backups on our site and insert the rows the query returns into a table on one central server where I'm running the stored procedure from. I have the server names stored into a table but when I attempt to connect to servers, I get an error which tells me that I need to create a linked server by using sp_addlinkedserver stored procedure. People that I work with tell me they want to do this without creating linked servers - Is there a way to accomplish? When I run the query, it only retrieves data from the local server I'm running the stored procedure on, but like I mentioned, when I attempt to connect to other servers, I get the error message that it couldn't find the server name in "syservers" and that I need to run sp_addlinkedserver. This also happens if I run the same query in OSQL from Windows command line.
Any help on this would certainly be appreciated.
Thanks in advance.
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Nov 15, 2006
Hi,
I need to access a table from another server in my procedure...I am now connected to say SERVERA...I need to access another table SERVERB.TABLE2 in the same procedure...
Is there a way to do that...
I need to connect to two servers from the same procedure to get data..
Please get back
Thanks,
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Nov 27, 2007
Hi,
I want to perform a join on two tables from two separate database servers.
Code Block
SELECT *
FROM tbl1 AS t1
INNER JOIN
"SERVERASQL2000".Production.tbl2 AS t2
ON t2.UserID = t1.UserID
Why do I get this error...
Invalid object name 'SERVERASQL2000.Production.tbl2'
thanks.
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Aug 24, 2000
I have to maintain several SQL Server 7 DBs across multiple NT Domains (same network). How do I access the SQL Server on the second domain from enterprise manager?
Thanks!
Lia
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May 3, 2007
We have a growing number of servers and databases on each server that all share the same (sub)set of sprocs and UDFs. DTS packages, which we use for data import, frequently need to be copied between the servers. What is the best way to maintain this? Ideally, I would like to be able to click a button and have a script creating or altering one or more sprocs automatically run aginst all DBs on all servers. Likewise, I'd like to be able to copy DTS packages to all servers.
We use SS2000 SP4 and plan to migrate to SS2005. We also use ASP.net 2.0 and VS 2005 SP1.
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Feb 29, 2008
Hi,
I have zero experience running any databases that spread further than 1 machine, so I have a few theory questions here that hopefully someone can help with. Hopefully this is the right forum, I'm not sure if it classifies as 'clustering'.
Anyways, we are launching a web app that is going to start with just 1 webserver/db server. For speed reasons, after some growth we might have to have a load balanced setup with a webserver in europe and one in north america. Basically the webservers are going to be serving 100,000's of files and each time a file is served it needs to be recorded in the database.
I think that if I'm connecting my european webserver across the internet to my db server, thats killing the purpose of having a webserver in europe to make for faster responses.
I am thinking that this european web server/db serving is only going to be logging the files served. Is there a way to import them into north american database everynight ?
I'm not sure what the best approach would be for something like this, but any suggestions are greatly appreciated.
Thanks very much,
mike123
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Nov 14, 2007
Is it possible to get an aggregate list of databases from multiple servers, without using SMO?
All target servers are running SQL Server 2005.
Ben Aminnia
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Oct 17, 2007
Hi, I was wondering what the licensing requirement would be for following scenario:
1 active sql server installation installed on a windows failover cluster.
1 passive mirror sql server (single server).
1 passive log-shipped sql server (single server).
In the microsoft white paper it says:
When doing failover support, a server is designated as the passive server. The purpose of the passive server is to absorb the data and information held in another server that fails. A passive server does not need a license, provided that the number of processors in the passive server is equal or less than those of the active server. The passive server can take the duties of the active server for 30 days. Afterward, it must be licensed accordingly.
So do I need to buy an enterprise license for each of the additional passive servers...in the above example meaning I would need 3 licenses in total?
Thanks,
Paul
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Jul 19, 2007
Can anyone outline some best practices for sending the same message out to multiple servers? What is the easiest way to do this?
Currently, I have a message sent from Server A to Server B, which is fired by a table insert, update, delete trigger.
The goal is to keep this table synchronized on many remote servers. It sounds like a tedious exercise to deploy the SSB messages, queues, services, etc to 20+ more sites! I am hoping there is a shortcut of some kind.
Any advice is appreciated.
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Feb 18, 2007
I'm using EncryptByKey to encrypt data in my SS2005 database. Since our server is really slow to access from home to work on, I used the Database Publishing Wizard and installed the db to work on at home. Then I created the certificate and symmetric key in my home db.
When I pull info using the DecryptByKey on our database at work on Windows 2003 Server, no problem, the data is decrypted. However, the same data does not decrypt at home on my Windows XP computer. I'm using TripleDes on both machines for the symmetric key (AES won't work on XP).
--To create my cert and key:
USE My_DB;
CREATE CERTIFICATE MyCert
ENCRYPTION BY PASSWORD = 'some password'
WITH SUBJECT = My Data',
START_DATE = '01/01/2007',
EXPIRY_DATE = '01/01/2099';
GO
CREATE SYMMETRIC KEY MyKey WITH ALGORITHM = TRIPLE_DES
ENCRYPTION BY CERTIFICATE MyCert;
GO
To encrypt:
OPEN SYMMETRIC KEY MyKey
DECRYPTION BY CERTIFICATE MyCert
WITH PASSWORD = 'same password as above';
Insert my record, use scope_identity to return primary key into @CustomerID.
INSERT INTO [Customers] (EncryptByKey(Key_GUID('MyKey'), @DataToEncrypt, 1, CONVERT( varbinary, @CustomerID)))
CLOSE SYMMETRIC KEY MyKey
To decrypt:
SELECT CONVERT(varchar(3925), DecryptByKey(EncryptedField, 1, CONVERT( varbinary, @CustomerID))) as PlainTextData
FROM Customers
WHERE (CustomerID= @CustomerID)
Everything works fine when I run the decrypt query on the database on our work server. But I'm not getting decrypted data at home. Is the symmetric key or certificate machine specific? If so, that will cause a huge problem when we deploy to a production server.
Thanks in advance for your help!
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