I opened the fmb and found that it was populating comments from DBA_TAB_COMMENTS. In 10g the comments against mviews are stored in DBA_MVIEW_COMMENTS unlike till 9i where it was in ALL_TAB_COMMENTS. So there was a little modification required.

BTW if you try to comment on the table (which is created with MVIEW) it won’t allow you to do so and instead raise ORA-12098: cannot comment on the materialized view.

So may be that little change needs to be done !

Sidhu

1. Create a blank database: The very first step is to create a blank database which is to be used as the target database. That can be done using Database Configuration Assistant. (In last step of the DBCA, change redo log file sizes to 500 MB each (or some appropriate values depdening upon the size of the databaes), as during import, lot of redo will be generated, so large redo size helps in that scenario)
   
   
2. Extract DDLs and create tablespaces: Now run the import with show=Y option and create a log of all DDL statements. The main things to be looked for in the log are DDLs to create tablespaces and DB links. You may need to change the create tablespace statements according to the version of the Oracle you are using. If you have the export taken in an older version, where dictionary tablespaces were being used, you will need to change the statements accordingly, to create locally managed tablespaces.
   (If you have the dmp file in compressed (.Z) format check here, to run the import directly from compressed file)

3. Adjust the size of SYSTEM, TEMP, USERS and UNDO: As SYSTEM, TEMP, USERS and UNDO tablespaces will get created with the database itself, so you can alter the sizes as per the sizes in the old database.

4. Edit tnsnames.ora and create dblinks: Now edit tnsnames.ora to include all the databases used in the db links and create db links using the statements from DDL log.

5. Run the import: Finally, run the import with FULL=Y and IGNORE=Y options and after the import finishes, look for any errors in the log. At last, compile all the invalid objects in the database (Here is the link to a script to compile all the invalid objects). (If the import terminates with ORA-01435, then have a look at this post.)

To read about all the options with imp have a look at Original Import & Export Utilities chapter of Oracle Utilities guide.

Sidhu

SYS@orcl AS SYSDBA> alter tablespace system offline;
alter tablespace system offline
*
ERROR at line 1:
ORA-01541: system tablespace cannot be brought offline; shut down if necessary

SYS@orcl AS SYSDBA>

Well lets try moving USERS tablespace.

SYS@orcl AS SYSDBA> column file_name format a50

SYS@orcl AS SYSDBA> set lines 100
SYS@orcl AS SYSDBA> select file_name,tablespace_name from dba_data_files where tablespace_name='USERS';

FILE_NAME                                          TABLESPACE_NAME
-------------------------------------------------- ------------------------------
C:\ORACLE\ORCL\USERS01.DBF                         USERS

SYS@orcl AS SYSDBA>

The current location of the datafile is C:\ORACLE\ORCL\. Suppose I have to move it to c:\oracle\oradata. So first lets take the tablespace offline

SYS@orcl AS SYSDBA> alter tablespace users offline;

Tablespace altered.

SYS@orcl AS SYSDBA>

Now copy the datafile to new location [Note the new directory should be already created]

C:\oracle\ORCL>copy USERS01.DBF c:\oracle\oradata
1 file(s) copied.

C:\oracle\ORCL>

Now make database aware of the new location of the datafile using alter database rename file:

SYS@orcl AS SYSDBA> alter database rename file 'c:\oracle\orcl\users01.dbf' to 'c:\oracle\oradata\users01.dbf';

Database altered.

SYS@orcl AS SYSDBA>

The last thing is to bring the tablespace online. If everything has gone rightly the message like this will appear and you can view the new location of the datafile.

SYS@orcl AS SYSDBA> alter tablespace users online;

Tablespace altered.

SYS@orcl AS SYSDBA> select file_name,tablespace_name from dba_data_files where tablespace_name='USERS';

FILE_NAME                                          TABLESPACE_NAME
-------------------------------------------------- ------------------------------
C:\ORACLE\ORADATA\USERS01.DBF                      USERS

SYS@orcl AS SYSDBA>

In next post we will discuss moving datafiles, controlfiles and logfiles.

Sidhu

cat list.txt | while read a
do
echo "spooling $a"
sqlplus username/password@string <<EOF
set feed off markup html on spool on
spool /home/oracle/$a.xls
select * from $a;
spool off
set markup html off spool off
EOF
done

I didn’t see any work around for Windoze as SQLPLUS << EOF thing doesn’t seem to work in Windows. Will try to find some alternative. If you come across something, do let me know.

Sidhu

My findings on 10gR2 on Windoze XP

SQL> var z numberSQL> var y numberSQL> exec :z := power(2,102)*2e-31;

PL/SQL procedure successfully completed.

SQL> exec :y := 1e125;

PL/SQL procedure successfully completed.

SQL> set timi onSQL> exec while (:y>1e-125) loop :y:=:y/:z; end loop

PL/SQL procedure successfully completed.

Elapsed: 00:00:00.10SQL> set timi offSQL> print y

      Y----------9.988E-126

SQL> exec :z := power(2,-104)*2e31;

PL/SQL procedure successfully completed.

SQL> exec :y := 1e125;

PL/SQL procedure successfully completed.

SQL> set timi onSQL> exec while (:y>1e-125) loop :y:=:y*:z; end loop

PL/SQL procedure successfully completed.

Elapsed: 00:00:00.04SQL> set timi offSQL> print y

      Y----------9.988E-126

SQL>

Sidhu

It goes like this

set feed off markup html on
spool onspool c:\salgrade.xls
select * from salgrade;
spool offset markup html off
spool off

And the xls it makes shows up like:

Sidhu