How do I set the default database in Sql Server from code?

问题

I can't seem to figure out how to set the default database in Sql Server from code. This can be either .Net code or T-Sql (T-Sql would be nice since it would be easy to use in any language). I searched Google and could only find how to do it in Sql Server Management Studio.

回答1:

from: http://doc.ddart.net/mssql/sql70/sp_da-di_6.htm

sp_defaultdb [@loginame =] 'login' , [@defdb =] 'database'

回答2:

ALTER LOGIN should be used for SQL Server 2005 or later:

http://technet.microsoft.com/en-us/library/ms189828.aspx

ALTER LOGIN <login_name> WITH DEFAULT_DATABASE = <default_database>

sp_defaultdb eventually will be removed from SQL Server:

http://technet.microsoft.com/en-us/library/ms181738.aspx

回答3:

Thanks Stephen.

As a note, if you are using Windows Authentication, the @loginname is YourDomain\YourLogin (probably obvious to everybody else, but took me a couple tries.

sp_defaultdb @loginame='YourDomain\YourLogin', @defdb='YourDatabase'

回答4:

If you're trying to change which database you are using after you are logged in, you can use the USE command. E.g. USE Northwind.

https://www.tutorialspoint.com/sql/sql-select-database.htm

来源：https://stackoverflow.com/questions/105950/how-do-i-set-the-default-database-in-sql-server-from-code