Different ways of Starting Up a Database

Options for Starting Up a Database
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1)Starting Up a Database Using SQL*Plus
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$sqlplus /nolog
SQL>conn / as sysdba
SQL>startup

2)Starting Up a Database Using Recovery Manager
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1)oracle@neptune:~$ rman target /

Recovery Manager: Release 10.2.0.1.0 - Production on Tue Apr 15 18:08:04 2008

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connected to target database (not started)

2)RMAN> startup

Oracle instance started
database mounted
database opened

3)Starting Up a Database Using Oracle Enterprise Manager
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1)emctl start dbconsole
2)paste the url in to the browser.
3)Enter host credential and database credential as sysdba.
4)Press yes.