Migrating From One Database To Another (Table Structures Slightly Changed)
Aug 20, 2008
We have a requirement where we need to migrate data from a legacy system (Oracle 10g) to our database (Oracle 10g again).
The thing is that the table structures will be slightly different between the two. Our current structure has some fields added/removed as well as some tables added/removed. But by and large the databases would be similar (about 75%).
While migrating I would need to map the fields in the source and destination manually. I would also need to populate some data to the fields that have been newly added.
Is there any way to do this? I was checking out Oracle SQL developer but could not proceed much.
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Jun 22, 2012
I have to migrate a 9i DATABASE from one platform (HP-UX V1 PARISC) to another platform (HP-UX V3 Itanium) and to upgrade it to 11Gr2. I know that multiple scenario exist (Ex:Exp/Imp,DataGuard,GoldenGate,Dblink/Direct Load,etc)
Scenario:
1-Activate force logging and suplemental logging in the source database.
2-Export the source database SCHEMA in consistent mode and import them in the 11gr2 database.
3-Record the scn of le last user transaction applied before the export.
4-Use LOGMINER to capture all the transaction applied after the export.
5-Stop the source database, applie the captured transaction by logminer and then switch the user to the new database.
I thought that the down time will be minimal, it will take only the time of reapplication the committed transaction captured by logminer.
It's feasible to do that or logminer have some limitation ? It's recomended or difficult to do that ?
PS: I'm not familiar with oracle LOGMINER
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Aug 14, 2012
I am migrating data from a Solid Database to Oracle, I am using Flat Files to do that.
1.- I download the data to flat files from Solid
2.- I move the files to Oracle server
3.- I upload the data to Oracle
Now, I have done the 90% of the data base, but I have found some tables that has description columns and in this description the users writes enters, so when I try to upload the data to Oracle SQL loader cannot recognize this characters.
Example:
'25','0.','5.','0.','0.','0.','0.','0.','0.','0.','0.','0.','0.','',''
'26','0.','2.','0.','0.','0.','0.','3.','0.','0.','0.','0.','0.','',''
'27','0.','1.','0.','0.','0.','0.','0.','0.','0.','0.','0.','0.','',''
'28','0.','1.','0.','0.','0.','0.','0.','0.','0.','0.','0.','0.','',''
'29','0.','38.','0.','0.','0.','0.','0.','0.','0.','0.','0.','0.','',''
'30','0.','13.','0.','0.','0.','0.','0.','6.','0.','6.','0.','0.','|SE RECHAZA B20CS50SNW ^M
^M
SE RECHAZAN CINCO PZAS ^M
DOS MOD. HSC15I41EH,DOS MOD. HSK15I41EH |Agregó: 06/06/2009 12:22:50
|','DEV. A PROV.'
'31','0.','50.','0.','0.','0.','0.','0.','0.','0.','0.','0.','0.','',''
'32','0.','9.','0.','0.','0.','0.','0.','0.','0.','0.','0.','0.','',''
'33','0.','2.','0.','0.','0.','0.','0.','0.','0.','0.','0.','0.','',''
How can I solve this ?
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May 18, 2010
I use a cursor to select records from a database table into a C structure as follows...
{
int iLoop = 0;
int iResult = 0;
[Code]....
The otc_multiplier field is NULL. As is the to_date sometimes. However, when I output the records later, the entries where the to_date is NULL come out fine (no value). But the otc_multiplier is getting output as 0.0 using...
// this is output later in another fuction using the following..
sprintf(newRecord, "%.1f",daServiceRecs->itemMultiplier);
If using c structures in this manner, what is the method for ensuring that numeric values are set to NULL when required?
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Apr 2, 2013
My job is running at 2 am and that time no application user is connected. Even though, my exp utility shows error on 3 tables (2 are temp tables), everyday. But when expdp is running without error, which was scheduled at 4 am.
Below are the error -
Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options Export done in WE8MSWIN1252 character set and AL16UTF16 NCHAR character set
. . exporting table DW_TEST_MOTOR
EXP-00056: ORACLE error 1466 encountered
ORA-01466: unable to read data - table definition has changed
[Code].....
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Apr 1, 2011
I have database A (Working in Live environment) and Database B copy of Database (Not live) I have Restored whole database (A) RMAN backup file on Database (B) Previous week now i don't want to change anything in any schema and want to import only updated and new records in the table in Database B
There are around 20 schema If for example i have everything in new database B all required database objects like Procedure,functions, packages with indexes in all tables and data in tables, i just want to add new data and updated data.
IF i do following in source database
expdp directory=dpump_dir dumpfile=table_data.dmp content=data_only schemas=ACCMAIN,HRMAIN,..... include=TABLE
AND Import in destination database B, will it add new data and update existing one in table and not touch the table structure and indexes.
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Feb 23, 2011
I'm trying to migrate an Oracle Enterprise Server database v9.2.0.1.0 deployed on Windows 2000 Server 32-bit to v10.2.0.5.0 on Windows 2008 R2 64-bit.Basically, I'm following instructions provided by this document:[URL],,,
1) Updated v9.2.0.1.0 to v9.2.0.6.0 on the old server
2) Backed up the database as follow:
SQLPLUS /NOLOG
CONNECT / AS SYSDBA
ALTER DATABASE BACKUP CONTROLFILE TO TRACE;
SHUTDOWN IMMEDIATE;
3) Installed Oracle Enterprise Server 10.2.0.4 on the new server and updated to v10.2.0.5
4) Copied trace files, data files, control files, archive logs and init.ora to the new server. Redo logs have been not copied since the ARCHIVELOGMODE is enabled on the old server.
5) Created an Oracle service on the new server as follow:
[code]....
Database dismounted.
ORACLE instance shut down.
SQL> STARTUP NOMOUNT
ORACLE instance started.
[code]..\
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