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what 's the diffrent between offline and offline drop

what 's the diffrent between offline and offline drop

2004-12-27       - By Alex
Reply:     1     2     3     4  

Hi oracle-l

i did a test about 'alter database datafile xxx offline (drop) '
it seems for the end user, there is no diffrent. i can recover the datafile and take the datafile online even i offline drop the datafile.

SQL > select * from v$version;

BANNER
-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ------
Oracle8i Enterprise Edition Release 8.1.7.0.0 - Production
PL/SQL Release 8.1.7.0.0 - Production
CORE 8.1.7.0.0 Production
TNS for 32-bit Windows: Version 8.1.7.0.0 - Production
NLSRTL Version 3.4.1.0.0 - Production

SQL > select name from v$datafile;

NAME
-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- --
C:\ORACLE\ORADATA\ALEX\SYSTEM01.DBF
C:\ORACLE\ORADATA\ALEX\RBS01.DBF
C:\ORACLE\ORADATA\ALEX\USERS01.DBF
C:\ORACLE\ORADATA\ALEX\TEMP01.DBF
C:\ORACLE\ORADATA\ALEX\TOOLS01.DBF
C:\ORACLE\ORADATA\ALEX\INDX01.DBF

6 rows selected.

SQL > alter database datafile 'C:\ORACLE\ORADATA\ALEX\TOOLS01.DBF ' offline;

Database altered.

SQL > alter database datafile 'C:\ORACLE\ORADATA\ALEX\TOOLS01.DBF ' online;
alter database datafile 'C:\ORACLE\ORADATA\ALEX\TOOLS01.DBF ' online
*
ERROR at line 1:
ORA-01113 (See ORA-01113.ora-code.com): file 5 needs media recovery
ORA-01110 (See ORA-01110.ora-code.com): data file 5: 'C:\ORACLE\ORADATA\ALEX\TOOLS01.DBF '


SQL > recover datafile 'C:\ORACLE\ORADATA\ALEX\TOOLS01.DBF ';
Media recovery complete.
SQL > alter database datafile 'C:\ORACLE\ORADATA\ALEX\TOOLS01.DBF ' online;

Database altered.

SQL >
SQL > alter database datafile 'C:\ORACLE\ORADATA\ALEX\TOOLS01.DBF ' offline drop;

Database altered.

SQL > alter database datafile 'C:\ORACLE\ORADATA\ALEX\TOOLS01.DBF ' online;
alter database datafile 'C:\ORACLE\ORADATA\ALEX\TOOLS01.DBF ' online
*
ERROR at line 1:
ORA-01113 (See ORA-01113.ora-code.com): file 5 needs media recovery
ORA-01110 (See ORA-01110.ora-code.com): data file 5: 'C:\ORACLE\ORADATA\ALEX\TOOLS01.DBF '


SQL > recover datafile 'C:\ORACLE\ORADATA\ALEX\TOOLS01.DBF ';
Media recovery complete.
SQL > alter database datafile 'C:\ORACLE\ORADATA\ALEX\TOOLS01.DBF ' online;

Database altered.
   

    Thanks
            Alex

tech_a@(protected)
2004-12-27


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