How to use the DBCC SHRINKFILE statement to shrink the transaction log file

To shrink the transaction log file, execute the following statements:

USE MyDatabase
BACKUP LOG MyDatabase TO DISK='C:\MyDatabase.bak'
DBCC SHRINKFILE (MyDatabase_log, 300) WITH NO_INFOMSGS

If the transaction log does not shrinks, run the statements again to make more of the virtual log files inactive.

1) BACKUP LOG MyDatabase TO DISK='C:\MyDatabase.bak'
Backup the transaction log to make most of the active virtual log files inactive

2)DBCC SHRINKFILE (MyDatabase_log, 300) WITH NO_INFOMSGS
Shrink the transaction log file