How Does SQL Server Deal With Multiple Databases (was Please Help)
Nov 9, 2004
Hi please could someone give me a explination of how SQLserver deals with multiple databases, We have multiple website that are all run from the same server all from SQLserver. Now we have a couple of databases which are very busy and have a lot of people constantly accessing them and then we have quite a few with much less traffic.
How would these databases effect each other? Would the busy database, mean that the many small databases will all be slowed dramtically?
Everything is okay at the moment but we are considering putting another fairly large database on the server and am worried about it having a sever effect on the smaller databases. Cheers Ed
what is the best way to uses ssis to deal with a CSV file that contains a number of records that contain a different number of fields ?
I could just load as a single column delimited by <CRLF> but then I would have to write the code to parse the line, effectively detokenising the columns myself but if that is the case then why uses ssis at all ?
We are in the design phase of a project where it is estimated there will be 150 SQL Server databases - each one housing similar information on each of 150 client sites. The client needs a reporting tool to analyze and make comparisons across databases. We were thinking about a using a data warehouse. Does SQL Server have a native solution to this type of problem ? Or is there another, better way to approach this ?
I have a situation where I need to do some reporting for simular asset records but the data is listed on different database from the same server. I was curious as to the way to write the queries that I will need.
Lets say I have 3 databases and I am looking for a asset of some type and the ID is a serial number. The serial will be on the main table from each database. Is there a way I can set a relation from a view between these records?
I.E.: 1: Database A -DSNA_tblMaiin - Serialnumber 2: Database B -DSNB_tblMaiin - Serialnumber 3: Database C -DSNC_tblMaiin - Serialnumber
I have to manage many SQL Server databases on several servers. How can I manage the jobs, backups and the space on the disc without going to each and every server and database and job? Is there any script to run this? It will be very helpful if you can provide me the sample script or point me to any web site where I can get the info/script for this. Thanks in advance...
Dear Readers,Is it possible, like in Access, to link to tables in other SQL databases that are on the same server? I have a query that I originally had in Access that queered from multiply databases. It did this by having those other tables in the other databases linked to the database that had the query.
I am using SQL Server 2000. I am working on a project where there will be multiple databases on a single instance of SQL Server. Each database will have the exact same schema but will be accessed by different groups of users. What is the easiest way to sychronize changes between the databases, so that if I add a column to one database, it will be reflected in the other databases. If I add, remove, or alter a stored procedure, I want the change to be made in the other databases. I want the data in each database to remain isolated. In other words, I do not want replication of the data, only the schema of the databases. I would like to have a single "master" database that I use to make any schema changes and all the other databases be schema mirrors of this database each with their own data. I have looked into SQL Server replication, but this didn't seem to work the way I wanted and I wasn't able to publish column changes etc.
hy all..How can I achieve the above ?Moreover can I retrieve data from multiple databases which are lying on different DBMSs ( like retrieving from database A which is on SQL and from database B which is on Oracle ) ?Rgds.
I just need to add multiple catalogs to the same linked server, in Sql Server 2000 or Sql Server 2005. Here i need only to add 3 databases in to a single linked server name.
I have migrated over 700 databases to another server and now I have to add a specific user to all these databases and sync , looking for script to add this user at once to all these databases.
I need a script that will return the mdf & ldf for multiple databases.
I am currently running...
sp_helpdb 'TestDataname'
...and copying the size of the mdf and ldf into an excel spreadsheet.
How can I get the mdf AND ldf file size for all of the databases in an instance? I need the MDF and LDF seperated and I want the actual size of the file as it appears on the file system.
I have a setup/deployment question regarding SQL Server Encryption.
Internal database encrypts data in 3 different tables. This could execute on any one of 6 different servers. The tables with encrypted data are replicated to another database on different servers (3)
How should the keys/certificates be created so that the data in the replicated database can be decrypted?
In my test scenario so far, I have been unable to have the second database decrypt the data that was encrypted on the first database (currently on the same server).
-- Create Database Master Key CREATE MASTER KEY ENCRYPTION BY PASSWORD = 'p@ssw0rd' GO
-- Create Certificate CREATE CERTIFICATE MyCertificate WITH SUBJECT = 'My Data Encryption Certificate', EXPIRY_DATE = '10/31/2010'; GO
CREATE SYMMETRIC KEY MyKey WITH ALGORITHM = AES_256, IDENTITY_VALUE = 'My Symmetric Key', KEY_SOURCE = 'Unique phrase that will be used to secure the key' ENCRYPTION BY CERTIFICATE MyCertificate; GO
We have multiple databases on a single instance in an OLTP environment. I have my data files on a separate SAN LUN from my transaction log files (and a few NDFs split out onto additional LUNs). I was wondering if there is a performance benefit to putting each LDF file on its own LUN? Or at least my few busiest LDFs?
We are currently on 2012, but I'm having to put together specs for a 2014 installation and need to answer this question without having an environment in which I can benchmark different setups. I just want to hear whether or not others have done this (why or why not?).
I have a requirement to delete all the orphans users for the databases. The issue I am having is with when database principal owns a schema in the DB, User cannt be dropped.
How do I transfer it to DBO in case I am looping multiple databases. This is what I got so far .
declare @is_read_only nvarchar (200) Select @is_read_only = is_read_only from master.sys.databases where name='test' /* This should be a parameter value */ IF @IS_READ_ONLY= 0 BEGIN Declare @SQL as varchar (200)
I'm trying to create an email report which gives a result of multiple results from multiple databases in a table format bt I'm trying to find out if there is a simple format I can use.Here is what I've done so far but I'm having troble getting into html and also with the database column:
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)
I have 7 source databases and one target database, all using the same structure. The structure is made of 10 tables, with foreign key constraints.
I need to merge the source databases into the target (which won't have any data before that process, but will already have the correct schema), and to keep the relationships between the records.
I know how to iterate over the source databases (with SMO foreach), but I'd like to know if someone can advise the best copy method for that context in SSIS ? (I don't want to keep the primary keys, but I need to keep the relationships...)
I am trying to restore multiple .bak backup SQL database files onto a new server. However, I have found that it will not allow me to restore multiple databases at once. Is there a way to do this so that I do not have to manually upload one at a time? I tried adding all the .bak files at once to the backup device window but it only did the first one listed. It would be so much easier to restore them all at once so that I do not have to continue this manual process. I am restoring them via device.
Hello, I am in the progress of designing a new section of my database and was thinking of creating a hole new database instead of just creating tables inside the database. My question is can you JOIN multiple tables in an SQL Statement from multiple databases. Ie, In the Management program I have a database called 'Convention' and another one called 'Services', inside the two databases there are many tables. Can I link say tblRegister from Convention to tblUser in Services? Thanks
Is it possible to retrieve Data from SQL Database #1 and insert it into SQL Database #2 using a Stored Procedure? Thanks. If so Can you show example. Thanks
I have a question about having one or multiple databases for a large project. What are the main differences between designing my database as one or breaking in to multiple databases. I should mention that there are many relationships between tables in different DBs in the multiple DBs state?
Hey there! I'm not sure how to explain this but here goes... I'm a bit stuck, a new project that's come about "requires" me to query multiple databases as if they were tables. 1 Oracle database which stores information on our staff (this database is a part of some MIS software and can't be changed in any way) 1 SQL Server 2005 database which stores information on staff sickness Basically say theres 1 table in each database Oracle DB People
Person_Code Forename Surname SQL DB Sickness
Person_Code Daydate Lets say the query I want to perform is to select all the records from sickness where person code is 22334 and also get their name from the other db, so the output may look like 22334 Dann Rees 01/01/2007 22334 Dann Rees 03/01/2007 22334 Dann Rees 10/02/2007 Now I realise I can write a quick function to pull the information but this is just a basic example. Effectivley what I "need" is to be able to query sickness while sub querying people to get the names, or some kind of pass through query? Please remember this is just a very simple example and the "actual" queries will be far more complicated, for instance finding all the employees of a certain department who is male and was sick in January. All the data for that example is stored in people (oracle) except for the dates which is stores in sick (SQL 2005). Now these are easy enough if they were tables in 1 database....but their not, their tables in 2 databases, and theres nothing I can do to change that :( All help appreciated as this is becoming very urgent. Many thanks Dann (I couldnt post this in the General data access forum for some reason)
Hi all:I am trying to create a website which will search and return results that are from multiple tables in different databases. I have the code to search a singular database right now, and I tried to make a connection to a second one, which worked, but I don't know how to send the proper sql commands to the second database or how to link them in the code. Does anyone have any pointers on creating a site which will search different tables in different databases with a known connection between databases? Any help would be really really really really appreciated.-Shrey
so, I am trying to write an sql that requires information across two different database. It's under the same sql server. However, the location of the tables are from different database.
Any links I can read about that can show me how to write the queries?
We have a number of databases(on sqlserver 7.0) which has the same structure but with data for different users. We would like to change the structure of the databases with minimum effort and with minimum down time. Is there any method to automate the change so that the change is reflected in all the databases when a single database structure is changed? Any suggestions in this regard are welcome and urgent
Okay this is a test...actually I am still learning SQL and need some help. Does anyone have any information on being able to move indexes from one database to another. My scenario is I have 3 databases, Development, QA and Production. I want to move/copy indexes I created in Development to the QA database. I have many indexes so I do not want to have to recreated them if I can avoid it. Any suggestions?
Currently developping a c# database based application, which will be used in different establishments worldwide. I'm currently a bit confused by the ms sql features offered. Because the huge data amount which will be fetched during application use from the database, the best option is probably to put a ms sql server in each establishment to realise quick data fething. Problem is that the servers, which are all running on the same database design have to be synchronised real-time. I read about datareplication with the merge option which I thought was a nice solution. The subscribers can only have read-only rights on these subscriber databases, because the merging doesn't work appropriate i heard, so this is no good solution. Then I read about distributing transaction coordination. Seems a good solution as well, but what happens if a server system crashes for one day and then comes back online? It won't be up to date anymore... Right now I think about a combination of these 2 features. DTC in combination with merge replication, but there must be a better solution. Fact is that a lot of users will be editing data worldwide non stop, and everyone has to be up to date. Because of huge data fetching I don't think it's a good solution to let everyone work worldwide with one single database. Is there a possibility to realise this with ms sql server? Because I'm getting more and more confused... Thx in advance.
I need some guidance! We are running SQL Server 2000. We have 4 or 5 databases with the same schema, and I need to make sure that their structures all stay synched. We will have more soon. I also need certain tables to have the same data across all the databases.
I need a way to manage changes on the multiple databases! Right now I generate a script in Enterprise Manager, then run it in Query Analyzer on each database, manually. There's too much room for error here.
Any suggestions are appreciated! I am currently evaluating Embarcadero's products, but they are complicated and confusing - I'm not sure yet which of their tools is meant for this purpose.
I have a problem like this. I have an application which shud be internet hosted. All transactions should be updated to the central server of the net as well as an intranet DB server. (I'll have a DB server - SQL Server 2000 in each intranet). Is this possible.. i'm planning to use ASP to develop the net based application. Thank you in advance.. Geetha R
Ok, so right now we have a bunch of queries similar to the following:
Code:
use db001 select co#=(001), fieldvalue from tablename where fieldid = '1'
use db002 select co#=(002), fieldvalue from tablename where fieldid = '1'
what i need to find is if there are duplicates of fieldvalue and have it display all in one.
Basically right now we run all these there are 25 databases and we export everything to a file and then open it in excel. we then format it it so its just co# and fieldvalue and then look for duplicates.
i would like to avoid the whole excel part and just run a query that will display any duplicates of fieldvalue across all 25 databases in "tablename"
Could anyone possibly help me out with an issue I am having... I need to copy all my SQL2005 databases from Server1 to Server2. How can I, using SSIS, copy all the databases and not just 1 specific one (database transfer task)??? My actual task is much deeper than this, but this is the main problem I seem to be encountering and I cannot find this anywhere on the web...
Over and above the what I have mentioned, is there a way to also specify a name of the target DB the copy will go through to? e.g. Server 1 has 3 instances, each one with a different copy of the same DB. I would like to copy all 3 copies to Server 2 running 1 SQL instance, but to target DB's like DB_dev, DB_prod and DB_test.
The latter section is not so crucial at the moment, but the first part is really an issues I am struggling with at the moment...
I'm very new to SQL, so you'll have to excuse the nubishness of this question. I've got my trusty O'Reilly book here!
We're using Microsoft SQL Server 2005 on our web server. I'm currently working on a project to get a few MS Access Databases available on the web page.
The web part is actually working fine, with the DBs exported into SQL for performance reasons. (From what I've read pulling data from the .mdb file could cause me problems in the future, so I'm tossing it all onto the SQL server from the start.)
Before I get into the project full-tilt, though, I'm curious about how best to organize all the data?
I'm using the Upsizing Wizard in Access for the conversions, and every new DB gets added under Databases. If this gets approved I may be looking at well over a hundred DBs which will eventually be converted and made web accessible.
I can keep everything neat and tidy on the web server by just tossing things in a few directories, but the menu on the SQL Server Management Studio is going to become a mess really quickly if I let it just keep adding to +Databases.
Is there a way to sort everything into a series of folder/groups, like how System Databases has it?
