unknown SET option beginning "oracle_sid..." SQL&gt; set oracle_sid=sid
SP2-0735: unknown SET option beginning "oracle_sid..."
SQL&gt; emctl start dbconsole;
SP2-0734: unknown command beginning "emctl star..." - rest of line ignored.
SQL&gt; set oracle_sid=sid emctl start dbconsole;
SP2-0735: unknown SET option beginning "oracle_sid..."
SQL&gt; SQL&gt; set oracle_sid=sid
SP2-0734: unknown command beginning "SQL&gt; set o..." - rest of line ignored.
SQL&gt; SP2-0735: unknown SET option beginning "oracle_sid...


why this service is invoked??can you tell that?
These commands should be run from the OS command line not the SQL prompt.