I need to create an odbc connection to my universe database. i created one in user DSN but the output is not working well.
could any one explain the difference so that i can understand?
A system DSN is available to all users on the computer ('system wide'), whereas a user DSN is only available to one user.
Related
Having an issue getting a SQL Server linked server to Oracle working while using a tnsnames.ora file on a network share.
If I copy the tnsnames.ora file to the local server, the linked servers work fine. However, we keep the file on a network share. My sql service accounts have read access to the share. I configure TNS_ADMIN system variable to the network share, the linked servers no longer work. I get ora-12154: could not resolve the connect identifier specified. tnsping and sqlplus work on the server. When I use process monitor to investigate further, I see:
Operation: createFile
Result: ACCESS DENIED
...
Impersonating: domain\MyLogin
This seems like an issue, but is maybe a false positive? If a process is trying to impersonate my account and access a remote resource it will fail since we don't have Kerberos configured to handle double-hop.
SQLPlus and TNSPing work just fine with the network share configured.
I've looked at this post and tried the items that seemed relevant, but had no success.
Additional Info:
sqlnet.ora has this:
SQLNET.AUTHENTICATION_SERVICES= (NTS)
NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)
I am able to open a file browser as a service account and open the tnsnames file.
I had this same issue while trying to connect a oracle 10g database via my WCF serivce developed in .NET 4.0 framework.
I was having multiple instances of ORACLE installed in my system. So, I modified the ORACLE_HOME to point to the Oracle 10g and it worked.
Also check the following:
Your service name might have an alias, so Make sure that your listener is listening for the same service name that you are using and check for both local and global entries. Check:
$ORACLE_HOME/network/admin/tnsnames.ora
Check your global_name setting with this SQL:
select * from global_name;
Also, Please make sure you add the Key TNS_ADMIN in the registry and create a enviroinment variable with name TNS_ADMIN
Regedit->HKEY_LOCAL_MACHINE->Software->Oracle->RightClick NEW->StringValue and name
Specify the correct path where the oracle is installed for Example
X:oracleproduct32bit10.0.1.0.0NETWORKADMIN
Edit
The below video also looks quite helpful. Please check.
https://www.youtube.com/watch?v=Sec8WG8gQPg
As an Oracle DBA I sometimes have to work with Windows. Maybe you can adopt from my experiences with Oracle on Windows.
Scenario:
An Oracle DB runs under a domain user. I want to restore a database from a backup which is located on a Windows share (sounds like "read" but it obviously isn't). I (or let's say the windows team) did not manage to find the proper way to grant the required permissions.
After many tries, the admins grant "everything" to the entire Oracle server.
Even though the Oracle process runs in a user context we did not find a set of permissions for the user only. Only the permissions for the entire server enabled the restore process to access the data.
From security point of view this is a horrible solution! But maybe it will help you to come closer to a solution (and if so, please share :-)).
Please point me in the right direction here. I need to instantiate the dialog that allows a user to select an SQL Server , change/alter authentication and select a database, all which are parts of the create DSN subsystem of ODBC. The application I am writing will need the user to select/create a connections to a desired database. I have seen it used everywhere, but cannot find which libraries are used to do it
As a general rule you don’t need nor want to use the built in dialogs. It is a simple matter to prompt or read in the server name, the database name, and then the user + password for the logon. Once you have this information, then you run some relative simple VBA code to create the links for you.
So in general, the approach to create some linked tables to SQL server does not require one to use the built in dialogs. And once you have some values, you may want to provide code to say switch between production and test – again no ODBC dialog etc. are required.
How to create DSN-less connections and how link to SQL server from code is outlined here:
http://www.accessmvp.com/djsteele/DSNLessLinks.html
i work for a company as java developer, they gave me laptop that was previously used by another person, to test my java application i need to have oracle on laptop and create some sample database with sample data. when I got the laptop i found that there is oracle installed on it, but i don't know if this is only oracle client or full oracle installation (server + client)
please can you tell me how to figure out if there is only oracle client on laptop or full database installation, plus i need to know if there is some default username and password so that i can access the database and create schema and tables in it, so that i can test my java application.
i thinking to see DBA but i thought of dropping a question here first, maybe i can solve the problem by myself
If it is an Oracle Client, it doesn't have bin/dbca
Oracle Home may indicate the installation's type. The default Oracle Home folder names are:
Oracle Database: dbhome_1
Oracle Client: client_1
Although to make sure, you should check the services looking for OracleServiceSID entry on Windows.
Run Command sqlplus on command prompt.
Check services of windows to know that the oracle database was installed on laptop or not.
Try to find oracle universal installer in all programs by this also you can get which version of database is installed.
Your second question is about default username/password
For this you can give username : "/ as sysdba".
It will not ask for password because it will authenticate thorugh OS authentication.
after login you can able to create new schema or user and tables.
You can check simply using command prompt. Open command prompt and type connect. Provide the username and password and press Enter. It will show "connected" if the database is in your system.
Username: system (default)
Password: (what you provided while installing)
Firstly goto my computer/ this pc and then click on
downloads option and see your app and check that Oracle
is available there or not.
Creating the database using EFCodeFirst on a local system had been done. But, when trying to create the database on web-server host, then it gives the error "Create database Permission denied."
I was not able to find out the actual problem in this.
Everything is working fine, if I create the database using EFcodefirst on any other local system but it doesn't work with the web-server host.
Please help in this !!
Thanks ..
Because your schema on a shared web-server host is not "dbo". So you can't or you have not enough permission to create the database (this is the default behavior of the EF Code first, when it can't find the database which is specified by the connection string).
you have 3 choices (at least):
ask for the higher permission (which is unluckily)
create a new empty database first, or ask (the host) to do that and then specify its details in the connection string.
or just turn off database migrations and do everything manulally (set Database.SetInitializer<MyContext>(null);).
I have a database in a local file that is used by a program. The program has limited functionality and I needed to run some quick queries. I installed SQL Server Management Studio Express 2005 (SSMSE), connected to the SQL Server instance, attached the database file, and ran the queries. Now the original program will no longer connect to the database. I receive the error:
Cannot open user default database. Login failed. Login failed for user 'MyComputer\MyUserName'.
I've gone back into SSMSE and tried to set the default database. I've opened up Security, Logins, BUILTIN\Administrators and BUILTIN\Users. Under General, I have set the default database to the program's database. Under User Mappings, I made sure the database is ticked and that db_datareader and db_datawriter are ticked.
The program uses the connection string:
Server=(local)\Instance; AttachDbFilename=C:\PathToDatabase\Database.mdf; Integrated Security=True; User Instance=True;
I know jack-all about database administration. What else am I missing?
This may not be answering your question specifically, but it may help others with similar issue caused by different problem
In my case the problem was my user is defaulted to a database which is not accessible for any reason (can be renamed, removed, corrupted or ...)
To solve the issue just follow the following instruction
Try to login again on the login page there is other tabs select
"Connection Properties".
under the tab locate "Connect to database" and select an existing database you have access to like tempdb or master
Once you are connected to the SQL Server Instance execute the below TSQL to assign the login a new default database.
Use master
GO
ALTER LOGIN [yourloginname] WITH DEFAULT_DATABASE = TempDB
GO
Alternatively once you connected change your default database name to master via UI
Article taken from :
http://www.mytechmantra.com/LearnSQLServer/Fix-cannot-open-user-default-database-Login-failed-Login-failed-for-user-SQL-Server-Error/
This problem manifested for me when I took my default db offline. Next thing I know I couldn't login. Switching to the Connection Properties tab and selecting the drop down to change the database I want to connect to also failed.
It let me in right away once I manually typed master as the db I wanted to connect to (on the Connection Properties tab).
First, try to isolate your problem:
Take a backup of the file! Some of the steps below can, apparently, in some circumstances cause the file to vanish.
Are you sure you are connecting to the same instance through Management Studio as the program is?
If possible, try to shut down the instance that you are not expecting to use.
Set the user's default database to master and try to make the program logon.
Try to login as the user through Management Studio - since you have integrated security, you should open Management Studio as the program's user.
Are you using "User instances" - perhaps without knowing it? If so, this may be helpful: http://blogs.msdn.com/b/sqlexpress/archive/2006/11/22/connecting-to-sql-express-user-instances-in-management-studio.aspx
I haven't worked much with files being attached in the way your program does - but you write that you attached the DB in the Management Studio as well. Have you tried detaching it there before running your program? Perhaps you are seeing the Management Studio and your program competing for exclusive access to the MDF-file?
EDIT: I added point 6 above - this is new in my own list of TODOs when troubleshooting this type of Login failed. But it does sound a lot like what you're experiencing.
EDIT2: In the first edit, new item was added to the list. So the numbers in the comments doesn't correspond with the numbers in the answer.
I finally figured this out, and my situation is different than every other I've read about tonight.
I had restored my database from a backup. I knew that there was a particular login user that I had been using, so I created that user in SSMS. However, there was already a user by that name under the database that had come in with the backup.
Since I had screwed around so much trying to fix this, I wasn't able to delete the user under the DB easily. I deleted the database and restored again. Then:
Delete the user under the Databases->[my database]->Users
Create the user again in Security->Logins (not under your DB, although that probably works too.
Go to the newly created user. Select properties. Then under User Mappings, tell it to make your database the default. Give it read and write access.
Summary: I had two users. One that came with the DB, and one that I had created. Remove the one that came with the DB and create your own.
First click on Option>> Button of “Connect to Server” Prompt.
Now change the connect to database to any existing database on your server like master or msdb.
More Details
https://blog.sqlauthority.com/2008/11/04/sql-server-fix-error-4064-cannot-open-user-default-database-login-failed-login-failed-for-user/
I've also had this same problem, it turned out that I was trying to access the built in membership classes (in a view), and that .Net was trying to create the database in the App_Data folder:
#Membership.GetUser().ProviderUserKey
This will trigger the system to try and create a database based in the built in membership system, which may not be the way your system is setup.
I had a similar problem had to simply download SQL Express Utility that is capable of starting User Instances. SSEUtil is a tool written by the Visual Studio team to help troubleshoot User Instance issues, you can read more about it in the read me file that is installed with the utility.
http://www.microsoft.com/downloads/details.aspx?FamilyID=fa87e828-173f-472e-a85c-27ed01cf6b02&DisplayLang=en.
Hope this will help.
In my case I had to set "connect to any database" right path:
On your instance, go to Security , then to Logins.
Right Click on there, you will see properties and you should click on Securables.
There it give possibility to connect to any database.