USE power checkpoint
ALTER DATABASE power SET RECOVERY SIMPLE
DBCC SHRINKFILE (Power)
DBCC SHRINKFILE (Power_log)
ALTER DATABASE power SET RECOVERY FULL
USE powerhis
checkpoint
ALTER DATABASE powerhis SET RECOVERY SIMPLE
DBCC SHRINKFILE (Powerhis_data)
DBCC SHRINKFILE (Powerhis_log)
ALTER DATABASE powerhis SET RECOVERY FULL