declare
time_before binary_integer;
time_after binary_integer;
begin
time_before :=DBMS_UTILITY.get_time();
FOR i IN 1..2 LOOP
dbms_lock.sleep(1);--休眠函数,要有管理员权限才能执行
END LOOP;
time_after :=DBMS_UTILITY.get_time();
DBMS_OUTPUT.put_line('所用的时间为:'||(time_after-time_before)*1000);
END;