############sql3:

https://blog.csdn.net/dataminer_2007/article/details/41363417
http://blog.51cto.com/hunt1574/2136259

b6usrg82hwsa3 28,795.60 call dbms_stats.gather_database_stats_job_proc ( )

select window_name, repeat_interval, duration, enabled from dba_scheduler_windows where enabled='TRUE';

修改周六日自动任务的运行时间开始于22点,持续时间240分钟：
exec dbms_scheduler.disable( name => 'SATURDAY_WINDOW', force => TRUE);
exec dbms_scheduler.set_attribute( name => 'SATURDAY_WINDOW', attribute => 'repeat_interval',value => 'freq=daily;byday=SAT;byhour=22;byminute=0;bysecond=0');
exec dbms_scheduler.set_attribute( name => 'SATURDAY_WINDOW', attribute => 'DURATION',value => numtodsinterval(240,'minute'));
exec dbms_scheduler.enable( name => 'SATURDAY_WINDOW');

exec dbms_scheduler.disable( name => 'SUNDAY_WINDOW, force => TRUE);
exec dbms_scheduler.set_attribute( name => 'SUNDAY_WINDOW', attribute => 'repeat_interval',value => 'freq=daily;byday=SUN;byhour=22;byminute=0;bysecond=0');
exec dbms_scheduler.set_attribute( name => 'SUNDAY_WINDOW', attribute => 'DURATION',value => numtodsinterval(240,'minute'));
exec dbms_scheduler.enable( name => 'SUNDAY_WINDOW');