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Manual Database Creation
Create an Oracle database manually with detailed instructions.
It’s always a good ideas to create Oracle database using DBCA. This method of creating Oracle database is outdated but you must also know how to create database manually. It is one of the most frequent interview questions too.
Before you start, make sure Oracle software is installed on the server
Copy pfile from any other database server and rename it to new database SID
other database pfile
initproddb.ora
change the file name to reflect new SID
initdevdb.ora
Open the initdevdb.ora file, find and replace all old SID (proddb) with new SID (devdb). Save and close the pfile. Now create all new directories on the server as per the pfile
mkdir <location_from_new_pfile>
Set environmental variables to connect new SID
export ORACLE_SID=devdb
Make sure undo tablespace name is same in pfile and also create database statement
STARTUP NOMOUNT;
CREATE DATABASE devdb
USER SYS IDENTIFIED BY sys
USER SYSTEM IDENTIFIED BY sys
LOGFILE GROUP 1 ('/u01/app/oracle/oradata/devdb/redo01.log') SIZE 100M,
GROUP 2 ('/u01/app/oracle/oradata/devdb/redo02.log') SIZE 100M
DATAFILE '/u01/app/oracle/oradata/devdb/system01.dbf' SIZE 325M
SYSAUX DATAFILE '/u01/app/oracle/oradata/devdb/sysaux01.dbf' SIZE 325M
DEFAULT TEMPORARY TABLESPACE temp TEMPFILE '/u01/app/oracle/oradata/devdb/temp01.dbf' SIZE 20M
UNDO TABLESPACE UNDOTBS1 DATAFILE '/u01/app/oracle/oradata/devdb/undotbs01.dbf' SIZE 200M;
Run post DB CREATE scripts
@?/rdbms/admin/catalog.sql
@?/rdbms/admin/catproc.sql
@?/sqlplus/admin/pupbld.sql
Update /etc/oratab file with new database.
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