http://www.techonthenet.com/sql/views.php

________________________________________

A view is, in essence, a virtual table. It does not physically exist. Rather, it is created by a query joining one or more tables.

Creating a VIEW
The syntax for creating a VIEW is:
CREATE VIEW view_name AS
SELECT columns
FROM table
WHERE predicates;

For example:
CREATE VIEW sup_orders AS
SELECT suppliers.supplier_id, orders.quantity, orders.price
FROM suppliers, orders
WHERE suppliers.supplier_id = orders.supplier_id
and suppliers.supplier_name = ‘IBM’;

This would create a virtual table based on the result set of the select statement. You can now query the view as follows:
SELECT * FROM sup_orders;

Updating a VIEW
You can update a VIEW without dropping it by using the following syntax:
CREATE OR REPLACE VIEW view_name AS
SELECT columns
FROM table
WHERE predicates;

For example:
CREATE or REPLACE VIEW sup_orders AS
SELECT suppliers.supplier_id, orders.quantity, orders.price
FROM suppliers, orders
WHERE suppliers.supplier_id = orders.supplier_id
and suppliers.supplier_name = ‘Microsoft’;

Dropping a VIEW
The syntax for dropping a VIEW is:
DROP VIEW view_name;
For example:
DROP VIEW sup_orders;

Frequently Asked Questions
________________________________________
Question: Can you update the data in a view?
Answer: A view is created by joining one or more tables. When you update record(s) in a view, it updates the records in the underlying tables that make up the view.
So, yes, you can update the data in a view providing you have the proper privileges to the underlying tables.
________________________________________
Question: Does the view exist if the table is dropped from the database?
Answer: Yes, in Oracle, the view continues to exist even after one of the tables (that the view is based on) is dropped from the database. However, if you try to query the view after the table has been dropped, you will receive a message indicating that the view has errors.
If you recreate the table (that you had dropped), the view will again be fine.

http://searchoracle.techtarget.com/definition/10g

10g is Oracle’s grid computing product group including (among other things) a database management system (DBMS) and an application server. In addition to supporting grid computing features such as resource sharing and automatic load balancing, 10g products automate many database management tasks. The Real Application Cluster (RAC) component makes it possible to install a database over multiple servers.
10g follows Oracle’s 9i platform. Oracle says that the g (instead of the expected i) in the name symbolizes the company’s commitment to the grid model. However, according to some reports, many early adopters are deploying 10g solely for its automation features and have no immediate plans of implementing a grid environment.

10g feature
1. Ability to rename tablespaces
2. Automated Storage Management
3. Grid computing – an extension of the clustering feature
4. Automatic Database Diagnostic Monitor
5. Support for bigfile tablespaces that are up to 8 Exabytes in size

11g feature
1. Client-Side Query Cache
2. Application and Schema Comparison
3. PDF Printing
4. Extensible Indexing
5. Data Guard Improvements

1.Uninstall all Oracle components using the Oracle Universal Installer (OUI).
2.Run regedit.exe and delete the HKEY_LOCAL_MACHINE/SOFTWARE/ORACLE key. This contains registry entires for all Oracle products.
3.Delete any references to Oracle services left behind in the following part of the registry:
HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Services/Ora*
4.It should be pretty obvious which ones relate to Oracle.
5.Reboot your machine.
6.Delete the “C:\Oracle” directory, or whatever directory is your ORACLE_BASE.
7. Delete the “C:\Program Files\Oracle” directory.
8.Empty the contents of your “c:\temp” directory.
9.Empty your recycle bin.

Source : http://www.oracle-base.com/
Link: http://www.oracle-base.com/articles/misc/ManualOracleUninstall.php

select * from CR_CLIENT_INFO
where REGEXP_LIKE (CI_CLIENT_NAME,’KHAI’,'i’)

1.’i’ specifies case-insensitive matching.
2.’c’ specifies case-sensitive matching.
3.’n’ allows the period (.)

Use Tools Oracle 10g and Toad 9

Step 1#

–##### Added By khairul. Date :06-Mar-2011
–##################### Start Get PS_LEASE_ASSET_ID(PS_LEASE_ASSET_ID)########################################

FUNCTION GET_NEW_LEASE_ASSET_ID (a IN NUMBER)
RETURN VARCHAR2
IS
tmp_id PS_LEASE_ASSET.PS_LEASE_ASSET_ID%TYPE;
tmpBID VARCHAR2 (5);
BEGIN
SELECT C.COUNTRY_ID ||SUBSTR(C.CMP_BRANCH_ID,7,3) BID INTO tmpBID FROM CM_CMP_BRANCH C WHERE C.IS_OPERATING=’Y';

SELECT NVL (MAX (PS_LEASE_ASSET_ID), TO_CHAR (SYSDATE, ‘yymmdd’)|| tmpBID || ’0000000′)
INTO tmp_id
FROM PS_LEASE_ASSET;

IF SUBSTR (tmp_id, 1, 6) = TO_CHAR (SYSDATE, ‘yymmdd’)
THEN
RETURN TO_CHAR (tmp_id + 1, ’000000000000000000′);
ELSE
RETURN TO_CHAR (SYSDATE, ‘yymmdd’) || tmpBID || ’0000001′;
END IF;
END;
–#########################End Get PS_LEASE_ASSET_ID#####################—–

It could be done in

Packege->Body->Copy Script as a editor->Add This

Step 2#

–##### Added By Khairul. Date :19-feb-2011
–##################### GET_NEW_FN_DEPO_SCHEDULE_ID(AT_ASSET_MAIN_TYPE)########################################
FUNCTION GET_NEW_LEASE_ASSET_ID(a IN NUMBER)
RETURN VARCHAR2;

It could be done in

Packege->Spece->Copy Script as a editor->Add This

Step 3#

CREATE OR REPLACE TRIGGER BDMIT_ERP_101.GENERATE_PS_LSASSET_ID
BEFORE INSERT ON PS_LEASE_ASSET FOR EACH ROW
BEGIN
:NEW.PS_LEASE_ASSET_ID:=TRIM(PKG_ERP_PRIMARY_KEY.GET_NEW_LEASE_ASSET_ID(0));
END;
/

It could be done in

SQL editor

All for Oracle 10g and Toad 9

CREATE [OR REPLACE] FUNCTION function_name
[ (parameter [,parameter]) ]
RETURN return_datatype
IS | AS
[declaration_section]
BEGIN
executable_section
[EXCEPTION
exception_section]
END [function_name];