（1）启用指定的跟踪标记。
DBCC TRACEON ( trace# [ ,...n ][ , -1 ] ) [ WITH NO_INFOMSGS ]

（2）禁用指定的跟踪标记。
DBCC TRACEOFF ( trace# [ ,...n ] [ , -1 ] ) [ WITH NO_INFOMSGS ]

（3）显示跟踪标志的状态。
DBCC TRACESTATUS ( [ [ trace# [ ,...n ] ] [ , ] [ -1 ] ] ) [ WITH NO_INFOMSGS ]

实例：dbcc tracestatus(3205,-1)