若要允许 DBCC SHRINKFILE 命令收缩文件，首先需要通过将数据库恢复模式设置为 SIMPLE 来截断该文件。

 

示例，收缩数据库abce的事务日志

USE abce;  GO  -- Truncate the log by changing the database recovery model to SIMPLE.  ALTER DATABASE abce  SET RECOVERY SIMPLE;  GO  -- Shrink the truncated log file to 1 MB.  DBCC SHRINKFILE (abce_Log, 1);  GO  -- Reset the database recovery model.  ALTER DATABASE abce  SET RECOVERY FULL;  GO