问如何在用户连接8小时后终止Oracle DB中的用户会话？

EN

CREATE PROFILE "PROFILE_8H_EXPIRY" LIMIT
  SESSIONS_PER_USER UNLIMITED
  CPU_PER_SESSION UNLIMITED
  CPU_PER_CALL UNLIMITED
  CONNECT_TIME 480 -- Specify the total elapsed time limit for a session, expressed in minutes.
  IDLE_TIME UNLIMITED
  LOGICAL_READS_PER_SESSION UNLIMITED
  LOGICAL_READS_PER_CALL UNLIMITED
  COMPOSITE_LIMIT UNLIMITED
  PRIVATE_SGA UNLIMITED
  FAILED_LOGIN_ATTEMPTS UNLIMITED
  INACTIVE_ACCOUNT_TIME UNLIMITED
  PASSWORD_LIFE_TIME 0.33 -- Specify the number of days the same password can be used for authentication
  PASSWORD_REUSE_TIME UNLIMITED
  PASSWORD_REUSE_MAX UNLIMITED
  PASSWORD_LOCK_TIME UNLIMITED -- Specify the number of days an account will be locked after too many failed login attemps.
  PASSWORD_GRACE_TIME 0.33 --  If the password is not changed during the grace period marked in days, the password expires.
  PASSWORD_VERIFY_FUNCTION FUNCTION_8H_EXPIRY;

ALTER USER JOHN PROFILE PROFILE_8H_EXPIRY;