Was searching online for any description or explanation for Creating Control file in Oracle 11g .
All what i found is this code and could not understand it to be honest :
CREATE CONTROLFILE
SET DATABASE prod
LOGFILE GROUP 1 ('/u01/oracle/prod/redo01_01.log',
'/u01/oracle/prod/redo01_02.log'),
GROUP 2 ('/u01/oracle/prod/redo02_01.log',
'/u01/oracle/prod/redo02_02.log'),
GROUP 3 ('/u01/oracle/prod/redo03_01.log',
'/u01/oracle/prod/redo03_02.log')
RESETLOGS
DATAFILE '/u01/oracle/prod/system01.dbf' SIZE 3M,
'/u01/oracle/prod/rbs01.dbs' SIZE 5M,
'/u01/oracle/prod/users01.dbs' SIZE 5M,
'/u01/oracle/prod/temp01.dbs' SIZE 5M
MAXLOGFILES 50
MAXLOGMEMBERS 3
MAXLOGHISTORY 400
MAXDATAFILES 200
MAXINSTANCES 6
ARCHIVELOG;
Source for the above code : Creating Control Files
If that's ok i need small explination for the code , and if i want to Create three control files what should i do or change in the above code ?
Thank you guys already .
If that's ok i need small explanation for the code , and if i want to Create three control files what should i do or change in the above code ?
Yes, first of all you need to change your database name to database created before using create database or create controlfile command. Second path to these log and data files. Details explanation is given in Oracle's Online documentation which I have referenced below.
We create one control file for one database. In order to create control file first of all start the Oracle instance in nomount mode.
[user#localhost]$ sqlplus / as sysdba
SQL> startup nomount
SQL> create controlfile...
Reference:
CREATE CONTROLFILE
Related
I have a large table (3.5MM records) that I need to copy from one schema/database to another schema/database. I tried TOAD's copy data from table feature, but got errors and it never fully copied, in part because the connection keeps getting dropped. I'm trying the object copy feature of SQLDeveloper, and after 11 minutes, it's still copying. I tried the SQLPlus COPY statement but got a syntax error (help needed). I'm still open to extracting the data as INSERT statements that I can just run directly.
1) SQLPLUS Copy as follows:
copy from report_new/mypassword#(DESCRIPTION= (ADDRESS=(PROTOCOL=TCP)(HOST=10.15.15.20)(PORT=1541))(CONNECT_DATA=(SERVICE_NAME=STAGE))) to report/mypassword#(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=10.18.22.25)(PORT=1550))(CONNECT_DATA=(SERVICE_NAME=DEV))) CREATE USER_USAGE_COUNT USING SELECT * FROM _USER_USAGE_COUNT
The above gives me
SQL> start copy_user_count_table.sql
SP2-0758: FROM clause missing username
2) I tried TOAD
The TOAD "Copy data to another schema" fails due to the connection getting
dropped. I set the commit threshold first to 5000 then to 500.
3) I'm trying SQLDeveloper's copy function, but I think it's not going to finish anytime soon and it gives me no real progress indications. For all I know, it could be hung but that it just doesn't want to tell me.
4) I thought about creating a datalink, but I don't have the authority to create one, and it's in a corporate environment wherein the DBA's don't respond in under 3 days.
Todo: Should I write my own Java code to just do this one record at a time?? I shouldn't have to do this, but somehow it's easier to send a man to the moon than to copy data from one schema to another.
You can use the copy command of sqlcl which is part of newer SQLdeveloper releases. The sqlcl is found in the Sqldeveloper\bin directory and is named sql.exe (Windows) or sql (Unix/Linux/Mac). The steps to follow are:
Connect to Destination database with sqlcl
sql username/password#destindationdb
Use the copy command
copy from username#sourcedatabase create newtablename using select * from sourcetable;
Things start not close oracle process when I shutdown system, after I exec startup appear error ORA-01157 ORA-01110.
I very sure dbf file is existed, and I use dbv see the file, every thing is normal.
Last thing, I try offline drop those dbf, but cannot recovery them.
Please give me some help, thank you very much!
mount your database :
SQL> startup mount;
Provided your database is in NOARCHIVELOG mode, Issue the following queries :
SQL> select min(first_change#) min_first_change
from v$log V1 inner join v$logfile f on ( l.group# = f.group# );
SQL> select change# ch_number from v$recover_file;
If the ch_number is greater than the min_first_change of your logs, the datafile can be recovered.
If the ch_number is less than the min_first_change of your logs,
the file cannot be recovered.
In this case;
restore the most recent full backup (and thus lose all changes to
the database since) or recreate the tablespace.
Recover the datafile(If the case in the upper yellow part isn't met):
SQL> recover datafile '/opt/oracle/resource/undotbs02.dbf';
Confirm each of the logs that you are prompted for until you receive the message Media Recovery Complete. If you are prompted for a non-existing
archived log, Oracle probably needs one or more of the online logs to proceed with the recovery. Compare the sequence number referenced in the
ORA-00280 message with the sequence numbers of your online logs. Then enter the full path name of one of the members of the redo group whose sequence
number matches the one you are being asked for. Keep entering online logs as requested until you receive the message Media Recovery Complete .
If the database is at mount point, open it :
SQL> alter database open;
If the DBF file fails to mount then check the source of DBF file, whether it is imported from other database or converted with any other tool. Generally, if the DBF file does not have a specific form then it cannot be mounted, troubleshoot Oracle DBF file by following steps
https://docs.cloud.oracle.com/iaas/Content/File/Troubleshooting/exportpaths.htm
If the database is still causing the problem then there could be problems with other components and before mounting fix them with a professional database recovery tool like https://www.filerepairtools.com/oracle-database-recovery.html
I need to find the following 4 pieces of information about a target DB (version 11.2.0.4) from the RMAN database RC views:
Number of DB datafiles
Number of DB tempfiles
Oracle Version of the registered DB
The host that the registered DB resides on
So far I have the following:
Find the number of Datafiles
select max(file#) from rc_backup_set s, rc_backup_datafile d
where d.db_name='${DBNAME}'
and s.set_stamp=d.set_stamp and s.set_count=d.set_count
and s.completion_time > sysdate-1 /
Find the number of Tempfiles
select distinct(file#) from RC_TEMPFILE t where t.db_name='${DBNAME}' /
These give the correct answers in my limited tests but I'm not 100% sure they're correct. Does anybody know how to find these 4 pieces of info from the RC views?
Many thanks.
The 2 SQL commands provided (to determine the number of datafiles and tempfiles) are correct. The other 2 pieces of info need to be found elsewhere - it's not possible to grab those details from the catalog.
I am using Oracle XE 11g R2 and due to a mistake all the archivelogs where deleted by running delete archivelog all; command on RMAN.
Also one set of redo logs were deleted i.e. redo_g02a.log, redo_g02b.log and redo_g02c.log
Other redolog are available i.e. redo_g01a.log, redo_g01b.log, redo_g01c.log and redo_g03a.log, redo_g03b.log and redo_g03c.log
Is there a way I can startup the database now? It is a production database and I am really worried.
I tried copying from redo_g01a.log to redo_g02a.log ... but alert logs say:
ORA-00312: online log 2 thread 1: '/u01/app/oracle/fast_recovery_area/XE/onlinelog/redo_g02a.log'
USER (ospid: 30663): terminating the instance due to error 341
Any help will be much much appreciated.
First make a copy of your datafiles, redo logs, and control file. That way you can get back to this point.
If the database was shut down clean you can try clearing the group and it will be recreated for you.
SQL> connect / as sysdba
Connected to an idle instance.
SQL> startup mount;
ORACLE instance started.
Total System Global Area 1068937216 bytes
Fixed Size 2260048 bytes
Variable Size 675283888 bytes
Database Buffers 385875968 bytes
Redo Buffers 5517312 bytes
Database mounted.
SQL> alter database clear logfile group 2;
Database altered.
SQL> alter database open;
Database altered.
SQL>
If not you will need to recover and open with the resetlogs option. Unfortunately because you lost an entire log group you may also have lost data.
I have an Oracle 10G database and I need to write a fairly straightforward query that joins two tables and selects some data. However, I'd like to export the result list to an excel, so end users can use this .xls document to see the results and filter by one of the fields (location)
When I write the query, is there an easy way I can generate/ create an excel document that would hold these results as described above? The SQL doesn't need to run from within excel, but I guess that would be a useful feature now that I think about it!
Thanks.
There is simple solution for your request.
By using ora_excel, small pl/sql package which generates Excel xlsx file, you can select data and export selected data to Excel and set filtering.
Please see following example:
BEGIN
ORA_EXCEL.new_document;
ORA_EXCEL.add_sheet('My sheet');
ORA_EXCEL.query_to_sheet('select * from employees'); -- Select data from database
ORA_EXCEL.set_cells_filter('A1', 'K1'); -- Add cell filtering from column A1 to column K1
-- Save generated Excel to file with name example.xlsx to Oracle folder EXAMPLE_XLSX
ORA_EXCEL.save_to_file('EXPORT_DIR', 'example.xlsx');
END;
For more details please check here
Cheers
Pretty easy to do in excel; and when done user can right click the data and say "Refresh" to get the latest updates.
but why reinvent the wheel lots of online articles already explain how to do this... Here's one
http://blog.mclaughlinsoftware.com/microsoft-excel/how-to-query-oracle-from-excel-2007/
After you've connected to a table, you can edit the properties on the connection and enter custom SQL (copy and paste from your developer tools)
Since you cannot use OLE DB in your version of Excel. Use SPOOL to create a CSV file.
SQL> SET echo off
SQL> SET verify off
SQL> SET colsep ,
SQL> SET pagesize 0
SQL> SET trimspool on
SQL> SET feedback off
SQL> SPOOL ON
SQL> SPOOL C:\data.csv
SQL> SELECT COLUMN1,COLUMN2,COLUMN3....
FROM TABLE;
SQL> SPOOL OFF
The .csv file should open in Excel by default. Use proper column aliases so that users understand the column headers.
Quick way:
At first create a view which contains your Query(Best way because you might need to change this query later).
Be sure to properly have installed oracle client.
In Excel(2007 and above) in Data tab go this way:
From Other sources -> From Data Connection Wizard -> Microsoft Data Access - OLE DB Provider for Oracle
Now Enter your DataSource Name(Stored in tnsnames.ora) and user password
Find you view and Then You'll have what you need.
You can save password and set option to refresh automatically in connection properties.
You are able to query an oracle database directly from Excel 2003 however, your sql statements are interpreted by MS Query and because of this it can often be frustrating. I will assume the machine in question already has the ability to query your database and has properly configured the database naming.
To query your database from excel 2003 you must:
Install and configure oracle's ODBC Driver (You must have the 32bit drivers installed since excel03 is a 32bit application). ODBC can be configured under start > administrative tools > ODBC Data Source Administrator
Open excel 2003 and goto data > import external data > new database query.
This should bring up MS Query which is an Access-like interface.
Obviously this is a very brief starter to get you stepping in the right direction. If you have any specific questions, please comment and I will try and help you.
Step 1
Run Your Query
Right Click on Resultenter image description here
Step 2
Click on Export
enter image description here
Step 3
Select Format To Excel
Enter datasheet name and location
Step 4
Click on Next and then finish
enter image description here
You can do one thing.
First generate the output in a form that includes column separators using symbols (like , or #).
Import the data to the excel and then define the placeholders as the column separators.