I have a database A. I have taken a backup of database A called A.bak. I created a new database B. Now, I right click and Restore B from A.bak. In the Restore Dialog, I checked overwrite existing database and change the LogicalFileName from C:\Program Files\Microsoft SQL Server\MSSQL11.SQLSERVER2012\MSSQL\DATA\A.mdf to C:\Program Files\Microsoft SQL Server\MSSQL11.SQLSERVER2012\MSSQL\DATA\B.mdf and did the same with ldf file. But I am getting
Exclusive access could not be obtained because the database is in use.
Also tried,
ALTER DATABASE [B] SET SINGLE_USER WITH ROLLBACK IMMEDIATE;
Also sp_who2, there was no existing connection of [B]