sql 日誌文件截斷收縮

use mydb
ALTER DATABASE mydb SET RECOVERY SIMPLE WITH NO_WAIT
ALTER DATABASE mydb SET RECOVERY SIMPLE   --簡單模式
DBCC SHRINKFILE (N'mydb_Log' , 11, TRUNCATEONLY)   -- 11是大小  11M
ALTER DATABASE mydb SET RECOVERY FULL WITH NO_WAIT
ALTER DATABASE mydb SET RECOVERY FULL  --還原爲徹底模式