select log_reuse_wait_desc from sys.databases where name = ‘AdventureWorks’

If Output is “LOG_BACKUP”

— Execute 2 Times just in case —

BACKUP LOG AdventureWorks TO DISK=’NUL:’

— Now Truncate the Log —

USE AdventureWorks
GO
ALTER DATABASE AdventureWorksSET RECOVERY SIMPLE WITH NO_WAIT;
GO
DBCC SHRINKFILE(AdventureWorks_LOG, 100);
GO
ALTER DATABASE AdventureWorks SET RECOVERY FULL WITH NO_WAIT;
GO