I am creating a Windows application which have two SQL Server databases. One is in application/startup path and other is in different drive.
I have two SQL Server database files with different names. Both are in different location. There are same tables in both databases. I want toe create a join query between tables for different database.
So it is possible or not? If yes then how? This is my first question in stack over flow so please help me.
If your databases are on same sql server instances there is no need to create linked servers(because it will hurt performance),you can simply reference table with [DBName].[Schema].[TableName].
If you have same database with 2 files sql will handle that for you
If you have 2 instances than you could create linked servers or handle that in applicaiont(join 2 result sets)
As far as I am aware you cannot directly access an MDF file using VB.NET. It needs to be a SQL Server Setup importing that MDF File first. THat is also going to be a challenging taak since you really cant just point SQL to an MDF file.
http://www.daniweb.com/software-development/vbnet/threads/115645/connecting-to-an-.mdf-database
Other people have said you can do it. I recommend getting SQL Server 2008 Express which is free. http://www.microsoft.com/en-us/download/details.aspx?id=23650
If you setup 2 servers with a linked server all you will need to do is
SELECT * FROM TableName t JOIN LinkedServerName.DatabaseName.dbo.TableName on ...
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I am new to MS SQL and I am trying to do something that seems simple but is driving me crazy.
I want to write a query to pull data from two databases. Each database is on a different instance on the same DEV machine. (one is MS SQL 2008 and the other MS SQL 2005). I am using the Microsoft SQL Server Management Studio (MSSMS).
I have the basics figured out. I know the format of the query and what I need to do. My big problem is figuring out what the NAME of each server is?
SELECT LastName
FROM [servername1].CHA2.dbo.Customer
UNION
SELECT LastName
FROM [servername2].OBXKites.dbo.Contact
ORDER BY LastName
I used the server name that I connect to MSSMS (DLPT\HENRY) with and what is also returned by ##SERVERNAME
SELECT ##SERVERNAME returns DLPT\HENRY
I tried
DLPT\HENRY.CHA2.dbo.Customer
did not work
I tried it without the DLPT HENRY.CHA2.dbo.Customer
did not work
I need to future out what the NAME of the server is to use in the query.
[DLPT\HENRY].CHA2.dbo.Customer
The namo contains a backslash which is normally illegal in an identifier. You surround illegal names with brackets.
Note that you surround just the server name. In other words, it is [DLPT\HENRY].CHA2.dbo.Customer, not [DLPT\HENRY.CHA2.dbo.Customer].
You have to configure Linked servers. Then only different instances of SQL Server are able to communicate with each other.
Unfortunately you can't access tables in databases in separate SQL Server instances by default. You have a couple of options here - neither are simple and might require help from a DBA:
1) Use linked servers like this:
http://technet.microsoft.com/en-us/library/ff772782(v=sql.110).aspx
Then you will be able to refer to the second table in the format INSTANCENAME.DatabaseName.SchemaName.TableName
2) Use replication to get the table from the second database into the first database. Then the contents of the second table will be synched to the first database in more or less real time
Read about SQL Replication here
I have Server_A with DB_A and Server_B with DB_B, both of these are remote servers that I have no root access to.
Server_A is SQL 2012 and DB_A is set in Compatibility level 2008
Server_B is SQL 2008 and DB_B is set in Compatibility level 2008, of course.
I need to copy the data, including relationships and keys from DB_A to DB_B. How can this be done?
Using the import or export wizard I've only been able to move the data and all the relationships are list. Please give a guy a hand and teach him something!
One way is to right-click on the source database in SSMS and select Tasks > Generate Scripts. This will show a wizard which when completed will produce a text file with all the SQL statements needed to replicate the database on a new system.
The neat thing about the wizard is that it gives you a set options so that you can decide what is in the final output. So you get to
pick if you just want the data or the table structures or both.
The final result might not be a good option for large databases but it is very portable.
Actually you can back up to a .bak file.
Where you want to restore it is totally up to you.
If it doesn't work for some reason (it should work fine) you can always try to copy your database like so.
These two steps will copy the database intierly. Including the relationships and keys.
This is the only alternative I've found for your problem since you don't have sysadmin rights.
I have an application in classic ASP, and a database in SQL server 2005.
I transfer the database in SQL server express edition and I have one strange problem, I can see the tables in the database in this way:
information_Schema.dbo.test, so when I execute SQL command
select * From test
I get error that it can't find the table.
When I execute
select * From information_Schema.dbo.test
I do get results.
The problem is that my application is many many files and I can't rewrite the SQL commands.
Is there any way to find a solution in SQL without changing anything in my application?
I would guess you are not connecting to the information_Schema database but to some other db that does not contain the table. Did you put the table in the wrong place(Information_Schema doesn't sound like a typical application db location to me) or is your connection wrong?
we have received a single dump (.dmp) file created for multiple databases. Could someone please tell me
how do you create this single file ? and
more importantly how do I restore these databases to a new sql server instance
Can't check at the moment as not at my DB server, however if it's what I think it is, try right clicking on your SERVER name in SQL Management studio, navigate to tasks, and backup/restore databases.
This may also be an option on individual tables, containing multiple tables.
My original question was about whether to keep separate ASPNETDB.MDF from the application database or merge all the tables in one database. Checking the previous questions/answers, I learned that it depends on whether the membership data would be shared across several applications.
Now, my question is this. In case I decide to keep ASPNETDB.MDF separate from the application DB, how can I query 2 tables located in 2 different databases?
Thanks for helping.
If you have two databases/schemas on the same database server, you can query across databases with the following syntax:
select *
from database1.dbo.table1 t1 join database2.dbo.table2 t2 on
t1.field1 = t2.field2
If they are on physically separate servers, you can still do a cross-database query, but you need to link the servers first:
http://msdn.microsoft.com/en-us/library/aa213778(v=sql.80).aspx
You can check your SQL Server version by:
SELECT SERVERPROPERTY('Edition')
If you are using "SQL Azure" you will not be able to use a table from different database. You will get this error:
Reference to database and/or server name in 'DataBase.Schema.Table' is not supported in this version of SQL Server.
Even if you try to Query a different database from your file like this:
USE ANOTHER_DATABASE;
You will get this error:
USE statement is not supported to switch between databases. Use a new connection to connect to a different database.