ERP application and multiple tablespaces

Question

Hi All,
I am trying to build a ERP style application in my company...modules are Accounting, Purchase, Sales, Export, Payroll & HR.
So far I have finished Accounting..What I did is.
1. Created one table space called ERPShared and created tables in it which are shared among all the applications.
script is as follows.
CREATE TABLESPACE "ERPSHARED_DATA"
LOGGING
DATAFILE 'D:\XP\oracle\product\HGDB\oradata\ERPShared\SHARED_DATA01.DBF' SIZE 100M
AUTOEXTEND ON
EXTENT MANAGEMENT LOCAL UNIFORM SIZE 3M
SEGMENT SPACE MANAGEMENT  AUTO ;
CREATE USER "ERPADMIN"  PROFILE "DEFAULT" IDENTIFIED BY "erpadmin"
DEFAULT TABLESPACE "ERPSHARED_DATA"
TEMPORARY TABLESPACE "TEMP" 
    QUOTA UNLIMITED ON "ERPSHARED_DATA"
    QUOTA UNLIMITED ON "ERPSHARED_DATA_INDX"
    QUOTA 0         ON "SYSTEM"
    ACCOUNT UNLOCK;
GRANT CREATE SESSION TO "ERPADMIN";
GRANT CREATE TYPE TO "ERPADMIN";
GRANT CONNECT, RESOURCE TO "ERPADMIN";
GRANT CREATE ANY TRIGGER TO ERPADMIN;
GRANT ALTER ANY TRIGGER TO ERPADMIN;
GRANT DROP ANY TRIGGER TO ERPADMIN;
GRANT CREATE ANY PROCEDURE TO ERPADMIN;
GRANT ALTER ANY PROCEDURE TO ERPADMIN;
GRANT DROP ANY PROCEDURE TO ERPADMIN;
GRANT CREATE VIEW TO ERPADMIN;First of all plz tell me is this the right way of creating tablespace?
Second I want guidance from you guys that I have another user "Purchase" and other users too and HOW to assign this ERPShared tablespace to other users or shoud I keep all the tables in one ERPShared tablespace with one user? what is the correct method performance wise and concept wise.
Thanks

Answer 1

You should create seperate Users for different modules of the applications.
This will keep the system neat and clean.
Modularization is the key, and that is why you are creating seperate modules rather than creating 1 big application :)
HOW to assign this ERPShared tablespace to other users or shoud I keep all >>the tables in one ERPShared tablespace with one userRefer to the script for creating user (in your post)
CREATE USER "ERPADMIN" PROFILE "DEFAULT" IDENTIFIED BY "erpadmin"
DEFAULT TABLESPACE "ERPSHARED_DATA"DEFAULT TABLESPACE clause will assign this user objects onto the given tablespace name ("ERPSHARED_DATA" in your case). So to assign the same tablespace to other users, you must mention this tablespace while creating other USERS.
Generally, it is advisable to keep seperate tablespaces for different Users.
Example:
TABLESPACE USER
ERPSHARED_DATA ERPADMIN
ERP_PURCHASE_DATA PURCHASE
ERP_SALES_DATA SALES
In many cases, more than 1 tablespace for 1 user. For instance, if all the Large tables will be created in 1 common tablespace which will have big datafile.
You can find more:
http://72.14.235.104/search?q=cache:Z3DayME5gSEJ:proligence.com/noug_dw.doc+advantages+of+creating+separate+tablespaces&hl=en&ct=clnk&cd=2&gl=in
Search for keyword "Tablespaces"
Cheers,
Aalap Sharma :)