Relationships Between Tables In Different SQL Databases
Jul 27, 2007
There are several databases (currently in Access) that are being moved to SQL Server. Would prefer keeping those databases separate in SQL Server. How do you do something similar to Access's "link" capabilities and relate tables in different physical databases? For example, relate the authors of a document in a document database to persons in a people database where AuthorID in Docs.DocAuthors.AuthorID is related to People.Persons.PersonID
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Jul 9, 2006
(I wasn't sure which forum to pos this in. Let me know if you think there is a better one.)
I have an application that breaks down into two sets of data, Set A and Set B, for our purposes. Both Sets currently reside in the same database. Set A is a fairly static set of data, changing maybe once a week, if not less often. Set B is empty at first but it has a lot of dependencies to Set A. Items are chosen from Set A to fill Set B but never the otherway around.
Here is the problem. We continue to copy the "master" database whenever a new customer signs up. The problem is, anytime we have to update data on Set A we have to do it across multiple databases. Set B is never copied as its customer owned.
What I would like to do is create a separate database that contains Set A data only. Whenever we have a new customer, I create a new database that contains Set B only. I have done so, but the relationships and constraints cannot be done unless I use triggers and procedures.
Is there anyway to achieve what I am trying to do without using triggers and procedures?
Thanks in advance.
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Aug 21, 2006
Hi,
I'm trying to find the most efficient method of importing XML files into SQL Server using SSIS. The objective is to read these files created in a source directory and potentially there will be a large number of these created every second.
I've experimented with the XML Source data flow task and been able to import using either the OLEDB Destination or SQL Server Destination.Using the associated XSD file
These methods work well when there are no PK or FK relationships, i.e. the target tables are stand alone.
However when I use a schema that has relationships I need to be able to import and be able to return the key then use this key to import into another table to ensure the FK relationship and so on.....
From what I know I will need to create multple Data Flow tasks when reading a single xml file then in turn create a 'look up' on a table to see if this entity exists and on error insert using the OLEDB command and then somehow return the PK generated???
Has anyone tried this? And would be happy to share there experiences?
It seems a lot easier to use an SP and then use an execute SQL task method
Your thoughts would be greatly appreciated
Thanks
John
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Jan 25, 2008
hello,
i am wondering, for what i use relations between tables? if i make sure that the data inserted into the table matches, for what i need table relationships?
i have a table named Pictures with: PictureID, UserID, UserName, PictureName, Description...
do i have to make relationships between UserID from Pictures and UserId from aspnet_Users?
and the second table PicturesComments witch has: CommentID, PictureID, UserID, UserName...
do i have to makre relationship between PictureID from PictureComments and PictureID from Pictures AND between UserID from Pictures and UserId from aspnet_Users?
sorry for this stupid questions...
thanks
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Mar 12, 2014
I am creating a small piece of software which handles a pre-advice data file, several scanner inputting weights and a supplier weight report.
The pre-advice contains a list of barcodes and details revolving around that barcode, each barcode will be scanned and a weight will be obtained, this will be place in the DB.
Currently my tables can be summarized like this.
Pre-Advice Table
Barcode
Lots of other info…
Scanners Table
Barcode
Date
Time
Weight
Which device input this information
Suppliers Weight Table
Barcode
Date
Time
Weight
Here is the process(es):
1.Pre-advice table populated.
2.When the barcode is scanned and a weight is obtained, a record will be added to the scanners table and this becomes the ‘active’ weight.If there is already an ‘active’ weight against this barcode the user will be asked if they wish to use the ‘active’ weight already in the system or update the ‘active’ weight to the weight they have entered.
3.Then when the supplier weight report is inputted into its table, should the ‘active’ weight be less than the supplier weight, the supplier weight becomes the ‘active’ weight.
At any given time a user can pull a report based on information in the Pre-Advice table, which will need to include the ‘active’ weight for that barcode’s record.
Additionally, no weights should be deleted, I need a fully traceable log of who, what, where & when. I will need to pull reports on the trials of scans so it really is a must to keep these.
Furthermore, if a scanner was to scan the same barcode after the Suppliers weight had been input and the user chooses to replace the weight then, the scanners weight should become the new ‘active’ weight.
I believe I will need to modify my tables to accommodate my needs, however I am not sure exactly what or how to set up what I need.I understand I will need some type of relationship between all of the tables to be able to pull the report on the Pre-Advice table, but I am lost.
how I will need to set up my tables/relationships in order to achieve my requirements?
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May 15, 2008
Hi, I have two tables. One is called ContentRecord and it is one field, an identity field that is a primary key. I have another table that is has several fields including a field that is a foreign key called contentFK. I have set up a foreign key relationship between the tables. There is a one to many relationship. I would like to know the best way to add a record to both tables. The way I am thinking to do it is to do the insert statement to add the record to the ContentRecord which will return the value of the primary key field. Then do a seperate insert statement to insert the record into the second table where I set the contentFK equal to the returned value from the first statement. Does that make sense? Is there a better way to do this?
Thanks,
Laura
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Aug 24, 2006
Hi, I'm working on Sql Server 2005 Express and I'm trying to transfer over some of my tables with the primary and foreign keys relations as well as the data in them from one asp.net 2.0 website to another.But I can't seem to find the Import/Export option in Sql Server 2005 Express Edition, does anyone know how I can do this?Thanks in advanced.
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May 17, 2002
Can anyone give me an idea like, what percentage of organizations use 'code' to maintain the parent-child relations on their tables than
having FK constraints thru the db model? Because,all the companies that I worked with used 'code' to control the relationships across the tables(not the PK/FKs.!!)
Thanks.
Neil.
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May 29, 2003
I export all tables from serverA databaseAA to serverB (both SQL2k sp3)databaseAA with 'Success', but without any relationships. In SQL6.5 Tools of Transfer will bring all objects include relationship.
I also tried export "All Objects" which fails with unclear message. I just don't want to do a backup and restore....
thanks
David
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Mar 20, 2008
Can Anybody explain me this how to Do this ?
Is this done by definning the Primary key and foreign key constraints ?
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Mar 23, 2007
Hello Friends,
I am right now working on a project that has a database with over 100 tables in a database. Because of extreme time constraints the developers didn't build in any relationships or constraints between or in the tables. Now I need to remodel the database such that the database is more structured and normalized. I don't have much knowledge about the database design since it is a 2 year old application and the person who developed the database is now gone. I know remodelling the database would require knowledge of the existing database and business rules.
I was wondering if there are any tools that could suggest or discover relationships between tables. For eg. Lets say there are two tables named 'Customer' and 'Order'. I notice that there is a column named 'id' in Customer and a column named 'customer_id' in Order. So I ask the tool to discover a relationship between id and customer_id and it tells me that there is a one-one or one-many or no relationship by comparing values. I heard ERWin would be able to do that but thats expensive. Please do let me know asap.
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Nov 5, 2007
Guys,
I have 600 tables in my database, out of which 40 tables are look up value tables. I want generate truncate scripts which truncates all the tables in order of Parent child relationship excluding lookup tables. Is there any way to do this apart from figuring out Parent Child relationship and then writing the truncate statements for each of the table.
For example
EmployeeDetail table references Employee table
DepartmentDetail table references Department table
Department table references Employee table
My truncate script should be
TRUNCATE TABLE DEPARTMENTDETAIL
TRUNCATE TABLE EMPLOYEEDETAIL
TRUNCATE TABLE DEPARTMENT
TRUNCATE TABLE EMPLOYEE
IS there any automated way to figure out parent and child tables and generate truncate script for the same.
Thanks
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Jun 7, 2005
I've been searching around for some info on how to set this up, but with no luck.I need to have a .sql file that will set up a few tables and these tables will have relationships and contraints.I can do this by hand in enterprise manager, but need to set up some procedures that will do the same thing.For instance, I can create the tables just fine.....CREATE TABLE students ( sId int NOT NULL PRIMARY KEY, studentId varchar(50) NOT NULL, course varchar(50) )
CREATE TABLE courses ( cId int NOT NULL PRIMARY KEY, course varchar(50) NOT NULL, sco varchar(50) )But, I need to set up relationships in there somehow.Once student may have many courses (one to many) and one course may have many sco's (one to many) SCO would be another table.Can someone point me to a good link that would show how to complete these procedures?Thanks all,Zath
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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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Jun 29, 2015
trying to get a new database created then running a script to created the tables, relationships, indexes and insert default data. All this I'm making happen during the installation of my Windows application. I'm installing SQL 2012 Express as a prerequisite of my application and then opening a connection to that installed SQL Server using Windows Authentication.
E.g.: Data Source=ComputerNameSQLEXPRESS;Initial Catalog=master;Integrated Security=SSPI; Then I run a query from my code to create the database eg: "CREATE DATABASE [MyDatabaseName]".
From this point I run a script using a Batch file containing "SQLCMD....... Myscriptname.sql". In my script I have my tables being created using "Use [MyDatabaseName] Go CREATE TABLE [dbo].[MyTableName] .....". So question is, should I have [dbo]. as part of my Create Table T-SQL commands? Can I remove "[dbo]."? Who would be the owner of the database? If I can remove the [dbo]., should I also remove dbo. from any query string from within my code?
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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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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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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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