OFFLINE不同选项的测试（NORMAL,TEMPORARY,IMMEDIATE）（一）

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SQL> archive log list
Database log mode              Archive Mode
Automatic archival             Enabled
Archive destination            USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence     2
Next log sequence to archive   4
Current log sequence           4
SQL> alter system switch logfile;

System altered.

SQL> create table t(scn int) tablespace users;

Table created.

SQL> insert into t select dbms_flashback.get_system_change_Number from dba_objects where rownum<=1000;

1000 rows created.

SQL> commit;

Commit complete.

SQL> select max(scn),min(scn) from t;

MAX(SCN) MIN(SCN)
---------- ----------
658591 658591

SQL> select change# from v$instance;
select change# from v$instance
*
ERROR at line 1:
ORA-00904: "CHANGE#": invalid identifier

SQL> insert into t select dbms_flashback.get_system_change_number from dba_objects where rownum<1000;

999 rows created.

SQL> insert into t select dbms_flashback.get_system_change_number from dba_objects where rownum<2;

1 row created.

SQL> select distinct scn,count(*) from t group by scn;

       SCN   COUNT(*)
---------- ----------
    659277          1
    658591       1000
    659275        999

SQL> insert into t select dbms_flashback.get_system_change_number from t;

2000 rows created.

SQL> select distinct scn,count(*) from t group by scn;

       SCN   COUNT(*)
---------- ----------
    659277          1
    658591       1000
    659275        999
    659295        469
    659293       1531

SQL> commit;

Commit complete.

SQL> select group#,bytes,archived,first_change#,sequence#,status from v$log;

    GROUP#      BYTES ARC FIRST_CHANGE# SEQUENCE# STATUS
---------- ---------- --- ------------- ---------- ----------------
         1   52428800 YES        637009          4 INACTIVE
         2   52428800 NO         658540          5 CURRENT
         3   52428800 YES        614226          3 INACTIVE

SQL>
SQL>
SQL> alter system checkpoint;

System altered.

SQL> select substr(name,1,40) dname,checkpoint_change#,last_change#,offline_change#,status from v$datafile;

DNAME
--------------------------------------------------------------------------------
CHECKPOINT_CHANGE# LAST_CHANGE# OFFLINE_CHANGE# STATUS
------------------ ------------ --------------- -------
/u01/oradata/orac10g21/system01.dbf
659333 602446 SYSTEM

/u01/oradata/orac10g21/undotbs01.dbf
659333 602446 ONLINE

/u01/oradata/orac10g21/sysaux01.dbf
659333 602446 ONLINE

/u01/oradata/orac10g21/example01.dbf
659333 602446 ONLINE

/u01/oradata/orac10g21/testing_lmt.dbf
659333 0 ONLINE

/u01/oradata/orac10g21/tbs_test_02.dbf
659333 0 ONLINE

/u01/oradata/orac10g21/tbs_test_03.dbf
659333 0 ONLINE

9 rows selected.

SQL> set linesize 2000
SQL> select substr(name,1,40) dname,checkpoint_change#,last_change#,offline_change#,status from v$datafile;

DNAME                                                                            CHECKPOINT_CHANGE# LAST_CHANGE# OFFLINE_CHANGE# STATUS
-------------------------------------------------------------------------------- ------------------ ------------ --------------- -------
/u01/oradata/orac10g21/system01.dbf                                                          659333                       602446 SYSTEM
/u01/oradata/orac10g21/undotbs01.dbf                                                         659333                       602446 ONLINE
/u01/oradata/orac10g21/sysaux01.dbf                                                          659333                       602446 ONLINE
/u01/oradata/orac10g21/users01.dbf                                                           659333                       602446 ONLINE
/u01/oradata/orac10g21/example01.dbf                                                         659333                       602446 ONLINE
/u01/oradata/orac10g21/testing_lmt.dbf                                                       659333                            0 ONLINE
/u01/oradata/orac10g21/tbs_test_01.dbf                                                       659333                            0 ONLINE
/u01/oradata/orac10g21/tbs_test_02.dbf                                                       659333                            0 ONLINE
/u01/oradata/orac10g21/tbs_test_03.dbf                                                       659333                            0 ONLINE

9 rows selected.

SQL> select name from v$datafile;

NAME
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
/u01/oradata/orac10g21/system01.dbf
/u01/oradata/orac10g21/undotbs01.dbf
/u01/oradata/orac10g21/sysaux01.dbf
/u01/oradata/orac10g21/users01.dbf
/u01/oradata/orac10g21/example01.dbf
/u01/oradata/orac10g21/testing_lmt.dbf
/u01/oradata/orac10g21/tbs_test_01.dbf
/u01/oradata/orac10g21/tbs_test_02.dbf
/u01/oradata/orac10g21/tbs_test_03.dbf

9 rows selected.

SQL> alter tablespace users add datafile '/u01/oradata/orac10g21/users02.dbf' size 10m;

Tablespace altered.

SQL> select substr(name,1,40) dname,checkpoint_change#,last_change#,offline_change#,status from v$datafile;

10 rows selected.

SQL>