Manual database

Question

if i have default database during installation named mydb1 ...which has its
password file pwdmyd1 in d:\oracle\ora9\database and the instance name is mydb1
and when i create a new database manually ..is it necessary to create a new
instance and a new password file..like
1) make a new instance with oradim...
2)and SET ORACLE_SID ....and
3)we have to create password file with orapwd
ARE ALL THESE STEPS NECESSARY
if we dont do these three steps then what happens...
4)IS PASSWORD FILE ASOCIATED WITH PARTICULAR INSTANCE
can any tell me in detail all the steps
thanks in advance

Answer 1

The steps aren't all that difficult, especially if you already have a reference init.ora to work off of.
1. Make sure ORACLE_HOME, ORACLE_SID, PATH, etc are set up properly
2. startup nomount pfile="whateveryourinit.ora"
3. CREATE DATABASE ${ORACLE_SID}
maxdatafiles xxx
mininstances xx
maxlogfiles xxx
maxlogmembers x
character set WE8ISO8859P1 (or whatever you want)
datafile
'/dir/to/where/system_01.dbf' size XXX M
logfile
group 1 ('/dir/to/where/redo_1a.log',
/dir/to/where/redo_1b.log') size XX M
group 2 etc
group N etc
4. You may want to change default storage on system at this point.
5. $ORACLE_HOME/rdbms/admin/catalog
6. I tend to create my rollback and temp tablspaces now.
7. $ORACLE_HOME/rdbms/admin/catproc
8. If you are using JServer, run those script too. Or if you are running Advanced REpilcation, run catrep.