This may be a newbie question but...
Say for example DatabaseA has failed over to the mirror. Then you call a stored procedure in that database that queries a table on DatabaseB that is on the principle (has not failed). What happens? Is mirroring smart enough to know that? If not, are there workarounds? Perphaps manually failing over the other databases?
Thanks
I'm not personally a DBA or claim to be a database expert, instead I am a software architect who works closely with database architects and DBA's. I'm presently architecting a system where we will have a smart client used in both Europe and the United States from the same database instance.
The system is to be used for performance testing of devices and then the results will be available to management through the same smart client used by test engineers etc. The first release is operational in the United States today with Poland coming online shortly.
Today we are weighing our options between having cross-geo database mirroring or merely having the database server in the United States with application server level caching implemented in Poland and the United States.
The .net framework's Windows Communication Foundation is used with a netTcpBinding and the service layer is asynchronous with the reliableSession option enabled.
Does anyone have any feedback on whether you would go with cross-geo database mirroring or would you use local application servers with possibly some caching capabilities at that layer? Please also describe the benefits and any risks associated with each also...
Thanks in advance,
Doug Holland
i know that db.owner.tablename works in the query analyzer, but what i really appreciate from anyone is how to apply this in vb6 code since the recordset is opened only from one db using the following syntax:
rs.open "select ...", dbname, ..., adopendynamic, adlockoptimistic ...
thanks
Hi all,
Could you please suggest workaround for systems that have cross database queries and want to use mirroring.
Thanks,
Avi
We maintain a few applications that query multiple databases on our server. We also have groups of users that multitask using different applications.
I've always created a Role in each database for every application.
Wondering if someone is in two Roles at once will we have security conflicts?
Hi,
I have the following scenario
1. 2 databases A & B which are both mirrored in high safety mode (manual failover)
2. The mirror of A & B are on a separate and remote site in relation to the Principal
3. Some of the application functions insert/update to database A&B as one transaction unit
My query is give the above scenario should I expect any DB incosistency on the mirror Partners for A & B in relation to cross db transactions? I believe not as the update on the Primary should be commited as whole on both Principal databases & mirror databases prior to the client getting confirmation on commit.
Further my understanding is that even in an automated failover with synchronous mirroring there should be no issues with cross DB transactions.
Are my assertions correct?
Thanking you in advance for any feedback.
Hi
I€™m about to move all our databases from an old lousy server to a brand new HP setup.
I have 8 databases (total of approx 100Gb) and I get 2 BL25p servers and SAN access for them.
Now, I want high availability and I like the idea of mirroring the databases for achieving that. On the other hand I don€™t like the idea of the mirror server doing almost nothing while the principal gets the entire load €“ seems like a waste of good resources.
But is this really the situation or mirror server also be loaded, just for being the mirror?
Now, if the main load is on the principal would I then benefit from distributing the databases on both servers, so both servers would act like principal and mirror?
What I mean is that server 1 could be principal for DB 1-4 while server 2 would mirror these DB€™s and likewise serever 2 would be principal for DB 5-8 and server 1 would mirror them.
Does it make sense? Would I benefit anything from this?
Thx a lot
Nicolaj
SQL Server 2012 SP2 - WIndows 2008 R2.
We are currently doing Mirroring from one domain to another (On a different subnet/network) via
Network1
DomainABCSQLAccount1 - Password1 -----> SQL Server Service Account
DomainABCSQLAccount2 - Password2 -----> SQL Server Agent Service Account
Network2
DomainABCSQLAccount1 - Password1 -----> SQL Server Service Account
DomainABCSQLAccount2 - Password2 -----> SQL Server Agent Service Account
And it works. We are planning to do the Log shipping but this time different Domain but same userID and Password
Network1
DomainABCSQLAccount1 - Password1 -----> SQL Server Service Account
DomainABCSQLAccount2 - Password2 -----> SQL Server Agent Service Account
Network2
DomainDEFSQLAccount1 - Password1 -----> SQL Server Service Account
DomainDEFSQLAccount2 - Password2 -----> SQL Server Agent Service Account
Is this possible without TRUST between the domains ?
Server A = primary SQL DBs (mirroring origination)
Server B = failover SQL DBs (mirroring destination)
For database mirroring a witness is required.
Can the witness live in another instance of SQL on server B?
Using SQL Server 2008, we would like propose mirroring between two servers of a critical database. Since we initiate, may require to clarify on its purpose and also required changes from application end.Any changes required from OS Level? (I believe both servers IP or Host name should be added in host entries. Mirroring ports should be allowed/open including Principal and mirror server IP Addresses): Windows Team.Any changes required from Application? (Instance name, authentication: user name and its password should be added in web config files): Application Team.Any changes required from Network Team?Also for mirroring both the principal and mirror servers should be with same version, does it only mean SQL Server 2008 versions are enough or does it also mean to say build numbers 10.00.4000 should also be same.URL....
View 5 Replies View RelatedUsing SQL Server Express 2005, I have two databases. AppDB - The main application database.GeoDB - A somewhat static ZIP code / states / other geographic stuff databaseI need to have some foreign key columns in tables in AppDB reference columns in the GeoDB database tables. Eventually other application database besides AppDB will be doing the same thing in our infrastructure. After googling and reading for days, here is what I
think I know:You cannot create foreign keys that reference tables in another database in SQL Server.You
cannot create foreign keys that reference columns in a view, and you definitely cannot make an index on a view that has base tables in another database.You can create a trigger that references tables in another database, but this can be flaky? (nested/recursive trigger problem).SQLServer
2005 supports multiple schemas within the same database. Maybe I should logically separate my databases this way? Seems like it would be a tough solution to manage since I already have some databases live in production that will eventually use this 'static' GeoDB. Also, seems like it
wouldn't be as portable as keeping the GeoDB info in its own database,
but maybe I'm being too software engineer-ish here - afraid of low
cohesion, high coupling.I will greatly appreciate any advice I can get, or any more options I am missing. Thanks,Adam Nofsingerucnmedia.com
" I have two sql server2000 database named db1 and db2.
i have a user named 'user1' who has permission in both database.I have used a 'Select * from tableOne'in db1 when i have this table 'tableOne'in db1.
now this table was droped and created in db2.
what i need is i should log in to db1 and access the same select statement which is there in application used by my clients.
i have created a view in db1 with the same name as
'create view tableOne as select * from db2..tableOne'
now i can access.
Is there some othere way with out creating view?
Hi,
I'm doing a web application that will get some information from an ERP.
At this moment I have 2 databases:
1) The aspnetdb, where I have the tables for Merbership and Role
2) The ERP database
I need to put my web application tables on one of these two DB's. This tables will reference the users from the membership and some products from the ERP DB.
I will store products requests that will store both UserID (from aspnetdb) and ProductID (from ERP DB). I'm thinking to put these tables on the aspnetdb, so that all web application tables stick together. But, I will loose tha ability to make joins with the ERP database, right?
Do you think this will work? Can someone make some comments about this situation, and give me some tips?
Thank you!
I am interested in adding a new row to a table 'Table05' that exists in a SQL Server 2005 database whenever a table 'Table00' in another SQL Server 2000 database has a row added to it. Can someone tell me a way to implement the above solution?
How do you write a SQL SELECT statement for a cross-database query in ASP.NET (ADO.NET). I understand the server.database.owner.table structure, but the command runs under a connection. How do I run a query under two connections?
View 1 Replies View RelatedHi,
I'm trying to get data from several databses of different kinds (Sql Server and Oracle) and from different servers - is that possible ?
If not - is there any way to copy some data from one database to another - like tables and their content (or partial content) ?
I tried to use "select name from <database name>..sysobjects where xtype = 'U'" but I get security error.
thanks,
Naama
Hi everyone!
I recently found out that using ADO to connect to the SQL server without mentionning the data source; then, by sending a query with the following syntax: dbname.owner.tablename.columnname... an implicit connection to the data source (database) is performed automatically. This way of connecting allowed me to manipulate accross two or more databases thing that is necessary in my project.
My question is:
1- Do anyone have any bad experience and/or negative consequence to such connectivity (memory consumption, unexpected disconnection, ...)? Please consider a very high frequency of manipulation since we are dealing here with a 24/24 hour operational site.
2- Are there any alternative solutions for cross database manipulation (select, insert, update, delete)?
Thanks
As far as I know SQL Server 2005 lists only dependencies within the same database. In many cases though there are objects in one database depending on objects in a different database on the same server. I unsuccessfully looked for a tool to list those and I ended up creating a script to do the job instead. Any improvements are appreciated, e.g. the script uses syscomments which may no longer be available in the next SQL Server version - I have not found a replacement sys.XXX table yet. Please note that you need to use a connection with access to all the SQL databases on a server and that it may take a while to run the script below if you have many databases with numerous objects in there. On the other hand these are exactly the cases when you need to know which of the thousands of objects are dependent on the table or view you are looking at.
P.S. Does anybody know where the extended properties get stored (hint - not in syscomments)? I was looking for those too, since often I document in the description of a field that it links to "DatabaseABC.dbo.TableXYZ.Field1"
Plamen Kouzov
==========
declare @searchstring varchar(50)
declare @dbid int
declare @DBName varchar(1024)
declare @command varchar(1024)
declare @ServerDBs table([dbid] smallint, DBName varchar(1024))
select @searchstring = 'DatabaseABC.dbo.TableXYZ'
insert into @ServerDBs ([dbid], DBName)
select [dbid], [name]
from master.dbo.sysdatabases
where [name] not in ('master','tempdb','model','msdb','pubs','Northwind')
create table #ObjectsFound (DBName varchar(500), ObjectName varchar(500))
while (select count(*) from @ServerDBs)>0
BEGIN
set @dbid = (select TOP 1 dbid from @ServerDBs)
set @DBName = (select DBName from @ServerDBs where dbid = @dbid)
set @command = 'use ' + @DBName + '; insert into #ObjectsFound(DBName, ObjectName) select ''' + @DBName + ''', [name] from sysobjects where id in (select [id] from syscomments where text like ''%' + @searchstring + '%'') order by 1'
exec sp_sqlexec @command
delete from @ServerDBs where dbid = @dbid
END
select * from #ObjectsFound order by 1,2
drop table #ObjectsFound
I have Two databases e.g. PDC,STB(has a table named "user" and fields of the table is "name","time_of_login").i want to create a stored procedure in PDC database which will insert data into STB's "user" table.
OR
how to run query from QueryAnalyzer by setting database from combobox at top as PDC and run select * from STB.user;
AS
in oracle we can connect via one user
and can select the tables of another user.
like
connect internal/oracle
select * from scott.emp;
I have a table EMPLOYEE in database PERSONNEL, and a table JOBS in database JOBMAN, I want to create a dependencies on the primary key EMP_NUM in table EMPLOYEE and the foreign key EMP_NUM in table JOBS, how can I do it in Enterprise Manager or any other tools?
View 5 Replies View RelatedI am attempting to remember the string to dump/restore a database to a different physical server.
I have the database on Server 1 and want to back it up to server 2. Can anyone refresh my memory?
Thanks
I am attempting to remember the string to dump/restore a database to a different physical server.
I have the database on Server 1 and want to back it up to server 2. Can anyone refresh my memory?
Thanks
Is there anyway to check for cross-database dependencies?
For example:
I have a stored proc in the Pubs database that contains a query that references a table in the Northwind database (as well as reference a table in the Pubs database.) I'm having no problems finding the depencency for the Pubs table. I can't seem to find the dependency for the Northwind table.
Any help would be appreciated.
Thanks in advance.
Scott
I saw this option in SSMS under "Servers, Property, Security tab". I looked at BOL but I still don't understand what it is or what it is used. Any help appreciated.
TIA,
Barkingdog
Using SQL Server 2005, I have two databases.
AppDB - The main application database.
GeoDB - A somewhat static ZIP code / states / other geographic stuff database
I need to have some foreign key columns in tables in AppDB reference columns in the GeoDB database tables. Eventually other application database besides AppDB will be doing the same thing in our infrastructure. After googling and reading for days, here is what I think I know:
You cannot create foreign keys that reference tables in another database in SQL Server.
You cannot create foreign keys that reference columns in a view, and you definitely cannot make an index on a view that has base tables in another database.
You can create a trigger that references tables in another database, but this can be flaky? (nested/recursive trigger problem).
SQLServer2005 supports multiple schemas within the same database. Maybe I should logically separate my databases this way? Seems like it would be a tough solution to manage since I already have some databases live in production that will eventually use this 'static' GeoDB. Also, seems like itwouldn't be as portable as keeping the GeoDB info in its own database, but maybe I'm being too software engineer-ish here - afraid of low cohesion, high coupling.
I will greatly appreciate any advice I can get, any links to articles, or any more options I am missing.
Thanks,Adam Nofsinger
ucnmedia.com
i have a database with cross database ownership chaining enabled. data base was detached and reatached as a result owner changed from sa to account that was used during reataching. will this affect chaining?
View 1 Replies View RelatedI have two databases Basket_ODS and Intelligence_ODS.
I created a user in the Basket_ODS and Intelligence_ODS databases as follows:
USE Basket_ods
GO
CREATE MASTER KEY ENCRYPTION BY PASSWORD = '*******'
CREATE USER BasketServiceUser WITHOUT LOGIN
ALTER AUTHORIZATION ON SERVICE::[Order Send] TO BasketServiceUser
GRANT CONTROL ON SERVICE::[Order Send]
TO BasketServiceUser
CREATE CERTIFICATE BasketServiceCertPriv
AUTHORIZATION BasketServiceUser
WITH SUBJECT = 'ForBasketService'
BACKUP CERTIFICATE BasketServiceCertPriv
TO FILE = 'BasketServiceCertPub'
In the other database...
I created the following:
USE Intelligence_ODS
GO
CREATE MASTER KEY ENCRYPTION BY PASSWORD = '************
USE Intelligence_ODS
GO
CREATE USER BasketServiceUser WITHOUT LOGIN
CREATE CERTIFICATE BasketServiceCertPub
AUTHORIZATION BasketServiceUser
FROM FILE = 'BasketServiceCertPub'
My Queue is in BASKET_ODS and is set up as:
ALTER QUEUE ODS.[Order Process Queue] WITH
ACTIVATION (
STATUS = ON,
PROCEDURE_NAME = ODS.ProcessOrderQueue,
MAX_QUEUE_READERS = 4,
EXECUTE AS 'BasketServiceUser'
)
I have performed the following grants in Basket_ODS
grant execute on ODS.ProcessOrderQueue to BasketServiceUser
ProcessOrderQueue calls [ODS].[MoveOrderTotals_Core] in the Intelligence_ODS database.
grant execute on [ODS].[MoveOrderTotals_Core] to BasketServiceUser
ProcessOrderQueue proc is set as follows:
ALTER procedure [ODS].[ProcessOrderQueue]
WITH EXECUTE AS 'BasketServiceUser'
[ODS].[MoveOrderTotals_Core] is set up as follows:
when I run ProcessOrderQueue I get an error message:
ALTER procedure [ODS].[MoveOrderTotals_Core](@Orderid uniqueidentifier)
with execute as 'BasketServiceUser'
I just don't understand when I run ProcessOrderQueue I get the following error message (when database trust is turned off)
The server principal "sa" is not able to access the database "Intelligence_ODS" under the current security context.
Can you help me figure out what I'm doing wrong. I've spent so much time on this security stuff. Is there another way to do this that is more straight forward without using database trust?
Hello,
I want to know how efficient are cross database selects such as
select column from data.dbo.table;
The reason I'm inquiring is because I want to design a database whereas I'm tightly coupling the tables in several databases that are all referencing each other in some way shape or form.
If it is not too efficient or if you know of a way to make these cross database selects more efficient please offer the suggestion.
Thank,
Sharp_At_C
What is the relative performance cost of peforming joins, inserts across databases as opposed to performing them on tables within the same physical database? I can't find much on this at all..
Thanks
Hello All,
I have an issue where my SQL query is taking an exceedingly long time to execute. It joins tables in 2 different databases. When I import the tables from both my databases into a single database and execute the query, it executes instantly!
I had a look at the execution plans of the same query when executed within a single database and the query when executed with tables across databases and there were differences in the execution plan. The single database query had parallelism whereas the query for cross database joins didnt have any parallelism.
Both the databases are in the same server.
I havent seen a case where cross database joins impact query performance so much. Any pointers?
Thanks
Arun
I have an application that segregates data into two differentdatabases. Database A has stored procs that perform joins betweentables in database A and database B. I am thinking that I have reachedthe limits of Application Roles, but correct me if I am wrong.My application creates a connection to database A as 'testuser' withread only access, then executes sp_setapprole to gain read writepermissions. Even then the only way 'testuser' can get data out of thedatabases is via stored procs or views, no access to tables directly.Anyone know of a solution? Here is the error I get:Server: Msg 916, Level 14, State 1, Procedure pr_GetLocationInfo, Line38Server user 'testuser' is not a valid user in database 'DatabaseB'The system user is in fact in database A and B.thanksJason Schaitel
View 4 Replies View RelatedWe're trying to follow the principle of least privilege here in setting up a user account for our website to use to access SQL Server 2005, but we're having a nightmarish time getting it to work.
The issue seems to be trying to get a limited access user account the ability to cross databases.
Here's the situation:
We have a User [WebUser] that we want to grant access to the database. This account has a login [WebUser] that has username=WebUser and password=ALongPassword.
This user only calls stored procedures in the database [WebData].
However, some of the stored procedures in [WebData] call stored procedures in the database [dbutil].
One of the stored procedures in [dbutil] inserts records into a table in a third database [dbutil_temp].[DebugLog].
This all works out great from my development account using Windows Authentication.
But as you might guess, if I do something like "EXECUTE AS [WebUser]" and run the same procedure on [WebData] things fall apart quickly. I've looked online regarding cross-database ownership chaining, but quite frankly, the whole users/logins/roles/schemas security model is confusing, and I'm getting nowhere fast on my own.
We really only want [WebUser] to have CONNECT and EXECUTE permissions on the primary [WebData] database, but it seems like we've got to do a lot more than that to get this to work.
I'd appreciate any help...
I have noticed rather strange behaviour of EXECUTE AS and REVERT sequence during the cross database calls which appear to be a bug. I tested this issue on developer edition of SQL Server 2012
Microsoft SQL Server 2012 - 11.0.5343.0 (X64)
 May 4 2015 19:11:32
 Copyright (c) Microsoft Corporation
 Developer Edition (64-bit) on Windows NT 6.1 <X64> (Build 7601: Service Pack 1)
This issue causes problems in SSISDB where similar piece of code appears in [catalog].[start_execution] and some other scripts in the [internal] schema. This was previous discussed in [URL] The following script illustrates the issue:
USE [master]
GO
CREATE DATABASE [Test1]
GO
CREATE DATABASE [Test2]
GO
-- Set Database to Trustworthy to allow cross database connection
ALTER DATABASE [Test1] SET TRUSTWORTHY ON;
GO
ALTER DATABASE [Test2] SET TRUSTWORTHY ON;
GO
USE [Test2]
GO
CREATE PROCEDURE [dbo].[TestContext]
AS
SELECT 'EXECUTION CONTEXT BEFORE EXECUTE AS CALLER', SUSER_NAME(), USER_NAME();
[code]....