A Question regarding Oracle OPatch Tool

Dear Sir,

I am new to Oracle and have a question in my mind about Oracle OPatch tool.
I am using Oracle 10.2 -

(1). Is OPatch a dedicated tool for Oracle Database patching? if not what are the other usage of OPatch?

(2). Can we use OPatch to upgrade Databases? (Ex - upgrade 10.2 to 11.1)

(2). if upgrade my Opatch tool with latest version, Still can I use my OPatch Tool (Upgraded) to patch my 10.2 Oracle Database?

Or should I keep my old OPatch tool for patch up 10.2 Database?

Thank You in advance.
Pradeep.
Pradeep SiriwardanaSystems EngineerAsked:
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slightwv (䄆 Netminder) Commented:
1: Yes.  No other use aside from reporting what patches are installed.

2: No.  That is the database upgrade assistant or a manual process.

3( next 2): You really cannot upgrade a specific tool.  You can apply a patch that will perform an 'upgrade'.  For example, some patches might require a certain version which would be a prerequisite patch.
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Geert GOracle dbaCommented:
the opatch is a tool to apply interim patches to a oracle database

for upgrading you can also use the upgrade assistant dbua
it takes most of the manual work out of the way
http://docs.oracle.com/cd/E11882_01/server.112/e23633/preup.htm#BABFEBAI

where you use opatch:
install base software 10.2.0.1 (using oracle universal installer = oui)
install patch software 10.2.0.4 (using oracle universal installer = oui)
apply patches (using opatch)

there are more links on support.oracle.com (search for dbua)
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Pradeep SiriwardanaSystems EngineerAuthor Commented:
Dear Sir,<br /><br />Thank You for your answer. For further clarification please tell me..Can I use default OPatch tool of my Oracle 10.2 database (Here default means, The OPatch tool installed with my Oracle 10.2 installation) to apply all Oracle released patches relevant to my Oracle version?<br /><br />Thank You in advance.<br />Pradeep
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