Download CREATION OF DATABASE – Practical Approach

Dharampal Singh
Data Processor
O/o the AG(A&E)-I, MP, Gwalior
CREATION OF DATABASE – Practical Approach
There are two ways to create an Oracle Database - either one can use the system created
Database that is created at the time of Oracle installation or can be created manually. It
should always be kept in mind that some settings can not be changed after Database
creation i.e. DB_BLOCK_SIZE AND CHARACTER SET. It is also mentionable here
that sufficient disk space should be available for Database creation.
STEPS FOR CREATION OF DATABASE :
1.
CREATE A DIRECTORY AT ANY LOCATION WHERE THE DATABASE
WILL RESIDE.
/home/oracle/dpgwl
(if you are at /home/oracle fire a command to create a directory as) –
$ mkdir dpgwl
$ pwd
$ cd dpgwl
/home/oracle/dpgwl
2.
COPY THE PARAMETER FILE init.ora TO THIS NEWLY CREATED
DIRECTORYcp /home/oracle/app/oracle/product/8.0.4/dbs/init.ora
3.
RENAME THE PARAMETER FILE init.ora as initdpgwl.ora
$ mv init.ora initdpgwl.ora
4.
OPEN THE initdpgwl FILE USING ANY EDITOR –
$ vi initdpgwl.ora
or
$ pico initdpgwl.ora
5.
CHANGE THE PARAMETER VALUE OF
DB_NAME= dpgwl,
CONTROL FILES= /home/oracle/dpgwl/ctldpgwl.ora
(It is always advised to keep more than one control file on different locations)
6.
SAVE THE FILE.
7.
DO NOT FORGET TO SHUTDOWN ALL THE RUNNING DATABASES.
8.
AT DOLLAR PROMPT EXECUTE THE FOLLOWING COMMANDS$ ORACLE_SID=dpgwl
$ export ORACLE_SID
9.
$ set ORACLE_SID=dpgwl
GO TO /home/oracle/app/oracle/product/8.0.4/dbs DIRECTORY AND
CREATE A FILE NAMED initdpgwl and make the following entry in
ifile=/home/oracle/dpgwl/initdpgwl.ora
AND SAVE IT.
10.
$ svrmgrl
svrmgr> connect internal
svrmgr> startup nomount pfile =/home/oracle/dpgwl/initdpgwl.ora
MESSAGE WILL APPEAR - ORACLE INSTANCE STARTED.
11.
svrmgrl> create database dpgwl
MAXLOGFILES 6
MAXLOGMEMBERS 6
MAXDATAFILES 30
MAXLOGHISTORY 100
LOGFILE
GROUP 1
('/home/oracle/dpgwl/dpgwllog1a.rdo',
'/home/oracle/dpgwl/dpgwllog1b.rdo') SIZE 5m,
GROUP 2
(‘/home/oracle/dpgwl/dpgwllog2a.rdo',
'/home/oracle/dpgwl/dpgwllog2b.rdo') SIZE 5m
DATAFILE
'/home/oracle/dpgwl/dpgwldata01.dbf'
size 30M
CHARACTER SET WE8ISO8859P1;
MESSAGE WILL APPEAR “ Statement Processed” Oorh…….. Database has been
created.
CONFIRMATION OF DATABASE CREATION - issue the commandsvrmgr> select name from v$database
12.
NEWLY CREATED IS USELESS UNLESS DATA DICTIONARY OBJECTS
AND PL/SQL OBJECTS ARE CREATED. TO CREATE THESE OBJECTS
EXECUTE THE CATALOG.SQL AND CATPROC.SQL . BOTH THE
FILES ARE AVAILABLE IN THE FOLLOWING DIRECTORY –
//home/oracle/app/oracle/product/8.0.4/rdbms/admin
13.
svrmgr> @/home/oracle/app/oracle/product/8.0.4/rdbms/admin/catalog.sql
svrmgr> @/home/oracle/app/oracle/product/8.0.4/rdbms/admin/catproc.sql
14.
NOW THE DATABASE REQUIRES NETWORK CONNECTIVITY WHICH
IS POSSIBLE TRHOUGH THE LISTENER PROCESS. THIS PROCESS
RECEIVES THE REQUEST FROM VARIOUS CLIENT MACHINES AND
HANDS IT OVER TO THE RESPECTIVE ORACLE PROCESS. TO
ACCOMPLISH THIS JOB THERE IS A FILE CALLED ‘LISTENER.ORA’
WHICH CONTAINS THE DEFINITION OF ALL THE DATABASES. BY
DEFAULT THIS FILE IS LOCATED IN –
/home/oracle/app/oracle/product/8.0.4/network/admin
(Edit the file by any editor)
$ vi listener.ora
(Add the following below SID_LIST_LISTENER)
(sid_desc=
(oracle_home=/home/oracle/app/oracle/product/8.0.4)
(sid_name=dpgwl)
)
SAVE THE FILE AND RESTART THE LISTENER PROCESS.
15.
$ lsnrctl stop (To stop the currently running listener)
$ lsnrct start (It will show the name of newly created Database)
16.
CONFIGURE THE CLIENT MACHINE ACCORDINGLY BY USING
“SQLNet Easy Config” or “ Net8Easy Config” depending on the SQL version.
Select Database Instance=dpgwl, Database Alias=db_gwl and Database
Host=10.80.1.1
17.
Start the CLIENT machine and run SQL with Newly defined database alias
name.
Note: Dear DBAs this was my first submission called “Creation of Database – Practical
Approach” . In the present status of VLC this script will be rarely used in any of the
office because all of us are running in 2nd or 3rd year of VLC project and have already
submitted one or two ‘Finance and Appropriation Accounts’ on the basis of VLC data.
But might help those who never experienced the scene of Database Creation But my
second submission will really help you in case of database crash. Very soon I will submit
my second part of “Creation of Database – Practical Approach ” . Please keep on
reading and commenting. In case of any doubt do not hesitate to write me .
Contd……..