Recently I was discussing about removing transaction log files on the #sqlhelp hashtag on Twitter. The question was whether we could remove an existing transaction log file after adding a new one. During the course of the discussion, I learnt that the file that was being removed was the primary transaction log file of the database.
When you attempt to remove the primary log file of a database from Management Studio or using ALTER DATABASE command, you will receive the following error:
Drop failed for LogFile ‘dbLogTest_log’. (Microsoft.SqlServer.Smo)
The primary data or log file cannot be removed from a database. (Microsoft SQL Server, Error: 5020)
This is by-design. We do not allow the removal of the primary transaction log file of user databases. This was first introduced in SQL Server 2000.
Tibor (Blog), a SQL Server MVP, has already blogged about how to remove transaction log files using T-SQL commands here. So, I am not going to duplicate the post here again by providing the same T-SQL commands.