Should I Seperate Tables Into New Databases??
May 22, 2008
My boss has asked me to look into this and I haven't been able to find any information on the web. I hope someone can answer this for me. We currently have a single database that is storing all the user information and transactions. Within the same database we are also logging different types of user activity. If both these tables are heavily used, would it make sense to separate it into different database, one for data and one for logging? Is there any pro or cons of having more than one database? Any opinion or suggestion would be greatly appreciated. I'm the closest thing they have to DBA and I'm really new to this. Thanks.
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Mar 20, 2008
Hello,
I have two databases in sql server. I'll call them DB1 and DB2. I have a table in DB2 that needs to form a relationship with a table in DB1. When I attempt to add a relationship I only see tables in DB2. Can this be done?
Thanks,
Mark
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Jan 4, 2004
Hi. I have been talking with some developers who have built a hosted application supporting multiple customers. Their database approach is to create a new, dedicated database (same schema each time) for every customer that signs-up.
This approach is contrary to typical hosted DB designs that I have delt with -- that is, a single database holding multiple customer information rather than a unique database for each customer.
Does the improved security of a dedicated database out-weigh the additional maintenance requirements?
If anyone has some objective thoughts on this topic, I'd love to hear them.
Thanks,
Bill
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Oct 15, 2007
We are looking at expanding our web application (C# and Sql Server). The module we are going to be adding will be far more processor intense (plotting and modeling) than any of the current code.
I need to know what the best design for this add on would be.
Would it be better to
a) Keep the new module as part of the core db (entire application on 1 database) and use loading balncing between 2 (or more) servers to handle the huge increase in demand?
b) Create the new module as a seperate database that runs on a seperate server?
If B is the best option (I am thinking it is not) is there a way to write easy and efficient queries and views of the 2 databases as 1.
Thanks
Justin
Justin Bezanson
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Nov 28, 2007
I've got a customer who thinks their data should be sepeated and reside on two seperate databases in case one is compromised. Now I've never heard of anyone doing this and would like comments from the users here as to why this should/(shoult not) be done.
I'm assuming that they want to keep their general info e.g. name and address on one database and keep other (medical info) on the other db.
None of our db's are outside of the firewalls so to me this makes no sense but I would like feedback.
thanks.
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May 9, 2006
I have a main database...for this large Web site...and Im wondering
what would be the PROS and CONS of using another database (located on
the same, or on another SQL Server). Im just thinking this would be
good incase we ever needed to take some load off one of the servers.
Also, we will be integrating Community Server into this Web site. Of
course you know CS adds its own database objects which crowd up our
main database objects.
We were thinking of giving CS its own database also; bad practice, or....it doesn't matter much?
Thank you
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Aug 29, 2007
Hello everyone,
Here's my situation...
I'm running a web service which involves 51 seperate servers and databases.
There are fifty licensee servers (One for each US state) and one corporate server.
Each night I need to upload sales and membership data from the licensee's databases to the corporate database to compile reports.
The application platform I'm using is ASP.NET 2.0 and the the database is SQL2005 express.
I want this process to be run automatically, so I believe it's a scheduled windows service I need to setup up in .NET to make the data transfers.
If anyone has already set something up like this, or knows the steps to take? I would love to have your input.
Thanks in advance,
Robert
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May 10, 2008
I have 4 tables with the respective amount of records
1) 6755
2) 2021
3) 2021
4) 355
They all have the same columns. However, they need to be seperate, or at least when I query them. I'll be accessing this database via the web. i was first afraid that a large database would cause major slow down when accessing the db. So I broke it up into 4 tables. If I combined all 4 tables into one large table and just had a column that differentiated the 4, how significant would be the change in speed when accessing the table? It's not a big deal to keep them seperate, its just that when I have to add or remove a column from one table I have to remove it from all the tables. Furthermore, I'm using a module from DEVEXPRESS, don't know if anyone has heard of it, but when you use a gridview, it loads up the entire table even though your paging (which I think is retarded), so for that reason I was afraid it would slow up my access to the db. Any thoughts?
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Jul 20, 2005
Does anyone have any idea how to syncronise two SQL identical tables acrossa network, between servers?We want to run our website from a SQL tables on the same server, but set upso that if the main SQL tables across the network change, or the tables onthe web server change, the two seperate servers willsyncronise/update/trigger updates to the tables on each other?We are running SQL server 2000.AHAJohn
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Apr 12, 2006
Hi folks, I've got a fairly easy one here me thinx. I'm looking for the best way to compare two entire rows from two seperate tables which have the same primary key.
Here's the basic lowdown:
I get some data every night from an external system (cache') via DTS. This is more or less my "master" data which drives my application. I have just been informed of an interesting constraint. If any of the data changes in the external system, those changes do not become effective until the first day of the ensuing fiscal quarter.
I'm solving this by running the DTS as normal, but populating a "duplicate" table which I will evaluate once per quarter for any changes. This is also the preferred solution because they would like to see a snapshot between current cache' data and the data my application is currently working with.
So, I end up with two identically structured tables. both tables have the same primary key and can be linked by an id field with relative ease. What I would like to do is a full row comparision once this join is established.
Right now I explicitly check the value of each column. ie:
WHERE t1.field1 <> t2.field1 OR t1.field2 <> t2.field2 OR t1.field3 <> t2.field3 ... etc
I'm hoping there is something buried in TSQL that I just don't know about that can handle comparing entire rows and tell me if they're different. Or perhaps there's another approach all-together.
Any thoughts?
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Apr 13, 2007
Hello,
I don't know if this could be done, but I will present this question...
I have an employee_table with empid, firstName, lastName, phExt columns.
I have another table called location_table that contains locationID, locationName, locPhext.
Here is the dataset from the 2 tables...
From Employee Table....
empid firstName lastName phExt
1 Ann Smith 1234
2 Barb Jones 4567
3 Jeff Teeves 8901
From Location Table
locationID locationName locPhext
1 Computer Room 3245
2 Board Room 1 8745
3 Conference Room 1 4564
Here is the data that I would like to pull in this format...
Ann Smith 1234
Barb Jones 4567
Board Room 1 8745
Computer Room 3245
Conference Room 1 4564
Jeff Teeves 8901
What SQL script could I use to produce the above results?
Thanks in advance
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Jan 28, 2008
Hi!
I have a big database which need some separation
in multiple filegroups.
Therefore I plan to move tables to new filegroups.
As I can understand this must be done by
dropping the clustered index and
recreating it on new filegroup, then data will move.
1. best way to get a list of all clustered indexes (sys.indexes)?
2. how to get index scripts? (using SSMS, right click is manual task, but I need scripts for than 100 tables)
3. when having the scripts it should be easy to replace filegroup part
4. after movement: just shrinking old files?
Thanks for help ;-)
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Mar 24, 2007
Hello.
I just created separate tables for each of my categories and wanted to know how to return them all to be viewed on one page using the SQL Datasource (or whatever) This is for user accounts. I just need to know that part.
Sincerely,
Computergirl
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Dec 11, 2004
Hi all,
I want to produce some output for Mainframe application. For that I want to insert values from multiple table as source to a single column (huge in size)of a different table (Destination table). There may be same related records in all of the source tables with the primary key. When I export values from the source tables , each related records should be insterted to the destination table's field (multiple entries for each table). Please advise.
Thanks
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Dec 10, 2007
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.
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Apr 14, 1999
Hi,
I'm writing an intranet application - a web survey engine.
I'd like to create a new database for each user that creates a survey form...
versus creating new tables for each survey.
Memory and disk space is not exactly the problem... just user permissions. If I dump all the results onto one database, doesn't it mean that this user can have access to all other tables(including the results of other surveys??)
Question is, does SQL Server reserve a bunch of memory for each database that I create, thereby hogging up a lot of space if I create more than one database.
Thank you.
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Apr 25, 2008
hi all,
i want to write SQL query that create table and insert in this table all databases' name and their tables' name that exist in my server.
e.g
DB name Table name
------- ----------
Northwind product
Northwind customers
Northwind Employees
Pubs authors
Pubs discounts
Pubs employee
msdb log_shipping_databases
msdb log_shipping_monitor
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Mar 11, 2002
Credit for this script really goes to ToddV (see http://www.sqlteam.com/Forums/topic.asp?TOPIC_ID=13737)
The following script issues a DBREINDEX command against every table in every database on your server. It can be modified to issue other commands, but this one in particular is helpful as we are migrating about 30 databases from SQL 7 to SQL 2000 (new server) and re-indexing is recommended. Here's the script:
DECLARE @SQL NVarchar(4000)
SET @SQL = ''
SELECT @SQL = @SQL + 'EXEC ' + NAME + '..sp_MSforeachtable @command1=''DBCC DBREINDEX (''''*'''')'', @replacechar=''*''' + Char(13)
FROM MASTER..Sysdatabases
WHERE dbid > 6 -- skip the 6 built-in databases. Remove to process ALL
PRINT @SQL -- Only if you want to see the code you're about to execute.
EXEC (@SQL)
Notes: There is a limit (nvarchar 4000) to how big your command can be, so too many databases will halt this.
------------------------
GENERAL-ly speaking...
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Feb 6, 2007
Hi All,
Is it possible to join 2 tables from 2 different databases in Stored Procedure.
Thanks in advance.
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Aug 3, 2007
hi,
i have one database ASPNETDB.MDF created by default when adding a user to my site, and MyData.mds - my database...i want to join the aspnet_Users table with another table created by me (in myData.mds), how can i do that? is hard if i should re-write all the data from myData into the ASPNETDB,i even writed both connectionStrings in the web.config but still with no succes...
is there any trick in the SQL statment? please help me
thank you
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Dec 21, 2007
Hello,
Let's say I created some tables in SQL server using the designer. Tables -> Right click -> New Table ->... How would I send someone else the script for creating that table? Or how would I send somebody else the tables?
Thanks.
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Jan 23, 2008
I am using Vista Business with Visual Web Developer and Sql Server Express 2005. I want to be able to access the data from two tables in a query. Both tables are attached to the application.
To refer to the two databases I have used the following
DATABASE.OWNER.TABLE (specifically TaskMgr.dbo.TaskTable)
For both databases I get the error "Invalid object name"
What am I missing?
Thanks
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Jan 2, 2006
Hi :)
I would like to know if it is possible to link two databases together
(in my case ASPNETDB, and another mdf database) so that I can run
queries on those shared tables. For example, I would like to use the
uniqueidentifiers from the ASPNETDB tables in my own tables.
Thank you!
(I do use the latest version of Visual Web Developer).
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Dec 16, 2001
I am using SQL server7.0. I am having two databases ,say database A and database B.Database A is the main database which is used in two /three projects.While database B is created by me for my work.From the database A, I am using the 4/5 tables, which i have copied in to the database B.
So, i want to update these tables in the database B as soon as any change (insert,update or delete ) occures on the tables in the database A.
That's why I am interested in doing these work.I have tried, but it doesn't work.So, I have placed these into these forum.
Is any body is having the trigger, procedure ready for doing these job. then plz,mail it to me
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Apr 23, 2007
Hey everyone. I am somewhat of a newbie to the database world.
I have been given the task of connecting two different SQL databases. Both are Microsoft SQL.
I want some of the tables of one of the databases to be linked to the tables of the other.
Is this possible?
Thanks
RoadHired
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Jul 2, 2004
I have two databases that each contain the same tables, but different data in the tables. For example, each data contains a table with the same name, arcus, that holds data on our customers. Although the data is different in each table, there is some overlap, particularly in the area of customer number since that is assigned automatically when a customer is entered and serves as the primary key for that table.
To consolidate, I need to merge the two databases. How can I import the data from one table in second database into a table in the first database and append a number to the customer number so that all data will be brought across.
To better illustrate:
database one has an arcus file with a field cusno and contains cusno 1-50
database two has an arcus file with a field cusno and contains cusno 27-58
The overlapping cusno's are not the same customer.
How can I get all the cusno from the arcus file in database two to the arcus file in database one?
Is this even possible?
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Nov 29, 2006
Hi,
I am trying to relate two tables but both are from different databases. I have a database 'Current' which has a table 'case' and another database 'Org' which has a table 'employee'. I want to establish a one-to-many relationship between employee and case. I created a coulmn 'employee_key' in the case table & entered values matching the pkey of the employee table. Then I wrote a query using joins to access the table records.
select Org..employee.pkey, Current..case.assignedengineer, Current..case.pkey from Current..case join Org..employee on Current..request.employee_key=Org..employee.pkey
Although the above query works fine, there is no relation between the two tables of the two databases, I wanted to know if this is the right way to achieve what i want to or is there a way in which i can actually create a relationship between tables of two different datbases. Can anyone suggest/help???
Also, I wanted to know if i can relate 1 table of SQL Server db with another table of Oracle DB. Please help ...........
Thanks
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Jan 22, 2004
Is it possible to make a join between two tables from different databases on same server? if yes, how can we do that?
And also if I want to make a join between tables on different databases on different server?how to do this. Please advise.
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Apr 24, 2007
i have 2 db's that are totally different except that they both have a table users and I want to make it that anytime the user table is updated or added to in one db - that it is copied over to the other db.
is this possible?
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Mar 26, 2008
Hi,
is there any way to find out the no. of databases and
no. of tables in a particular database using a sql query ???
If any server variable is used then please mention that???
thanx in advance
San
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Jan 24, 2006
HiI'm working on an ASP project where the clients want to be able toeffectively perform SELECT queries joining tables from two differentdatabases (located on the same SQL-Server).Does this involve creating virtual tables that link to another database, oram I completely on the wrong track?Any hints as to where I might find more information (buzz-words, etc.) wouldbe most appreciated.Thanks
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Jan 18, 2007
In a database, I am creating a new db. From there, I am setting up thetables, so that I can eventually create a front end (usually access,but I may attempt to be brave and lose the shell.) Anyway, I want touse a table, read-only for a lookup. It exists in another database onour system. Is there a way for me to link it into this database that Iam working on? I would think of it like in access when you go to do anew table and you choose to link the table from somewhere else. Thatis what I want to do. Can anyone possibly step me through this?I know basics of sql server and like to learn.Thanks!
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Apr 10, 2007
(SQL 2005)I'm looking to create a stored procedure to first "select name fromsys.databases where name like '%site'" then pass each name to thefollowing using some kind of loop "USE @name select name fromsys.tables where type = 'U'"I tried a while statement, but the master sys.databases recordsetdoesn't change..It's the loop I can't get to work.Any help is greatly appreciated!
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