两个小问题，关于scn和重做日志！！！！！！！！！！！！

x$ktuxe  你连接的用户的权限不狗  要sysdba身份
    
idle> connect lg@oradb
Enter password:
Connected.
[email protected]> connect sys@oradb as sysdba
Enter password:
Connected.
[email protected]> desc x$ktuxe
 Name                                                        Null?    Type
 ----------------------------------------------------------- -------- ---------------- ADDR                                                                 RAW(4)
 INDX                                                                 NUMBER
 INST_ID                                                              NUMBER
 KTUXEUSN                                                             NUMBER
 KTUXESLT                                                             NUMBER
 KTUXESQN                                                             NUMBER
 KTUXERDBF                                                            NUMBER
 KTUXERDBB                                                            NUMBER
 KTUXESCNB                                                            NUMBER
 KTUXESCNW                                                            NUMBER
 KTUXESTA                                                             VARCHAR2(16)
 KTUXECFL                                                             VARCHAR2(24)
 KTUXEUEL                                                             NUMBER
 KTUXEDDBF                                                            NUMBER
 KTUXEDDBB                                                            NUMBER
 KTUXEPUSN                                                            NUMBER
 KTUXEPSLT                                                            NUMBER
 KTUXEPSQN                                                            NUMBER
 KTUXESIZ                                                             [email protected]>