Database upgrade methods

And while upgrading an oracle RAC database, you must perform the following steps:

1. You should first upgrade the Grid infrastructure (Oracle clusterware and ASM) software.
2. prepare for the installation of oracle database software based on instructions from oracle documentation.
3. Install the oracle database software using oracle universal installer (OUI).
4. Execute the pre-upgrade script found at ORACLE_HOME/rdbms/admin/preupgrd.sql just to preview the types of items that the database upgrade assistant (DBUA) checks.
5. Run the root.sh script.
6. Finally do the upgrading process using database upgrade assistant (DBUA).

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Oracle has many methods or features to upgrade a database to higher version.

Here below are some of the methods that enables us to upgrade oracle database:

• Data pump
• GoldenGate
• Full transportable export/import
• Transportable tablespace(TTS)
• Manual upgrade
• create table as select
• Database Upgrade assistant (DBUA)

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