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Oracle: Introduction, Applications, Usage, and Advanced Features

A database management system manages large amount of data so that many users can access the data at the same time. Since the environment is multi-user these days, database management systems are very important for data management. Oracle helps in providing effective and efficient solutions for databases across the world. It provides failure recovery and is also secure and prevents any kind of unauthorized access. An application can be easily developed on oracle as it very user friendly and flexible. Your tool and feature selection is important as it significantly affects the application’s performance in many ways. Oracle provides its application developers stored packages and procedures, integrity constraints, database triggers, shared sql, cost based optimizer, locking and sequences for application developing process.

Oracle creates programs and accesses the databases using these programs:

The sql plus contains command line interface. You can access the databases using sql plus and write stored procedures. By sql commands you can retrieve data. The scripts can be run on sql, pl/sql or built in sql plus commands. They can also be combined for writing scripts.

Oracle developer is used to create forms, graphics and reports and is a 4gl GUI application builder. The two important components of oracle developer are oracle forms and reports. Oracle developer has evolved from creating client-server applications and now creates oracle application server running web applications. The current version of OAS is OAS 10g which is very expensive.

Html db is also an application builder designed for web development. An application sever is not needed for html db. It uses the apache web server which comes along with the database. Thus application development becomes cheaper with the use of html db. The html based html db is very thin and has approach which is limited to widgets that are html provided.

Oracle enterprise manager helps you to take desired actions in the databases. This helps in better management of the databases. Oracle 10g OEM provides grid control as well and is used primarily for administration purposes {though it can also be used for application monitoring and tuning as well}

Oracle usage guide

The oracle software can be installed by using oracle universal installer. It is a GUI tool which is used for viewing oracle software which is already installed on your machine. You should delete the old oracle software and install the new one. For interacting with oracle, you can use sql plus application. The application can be obtained on UNIX and windows programs. After logging in you can suitably alter the oracle tables, schemas and commit data. You can change the date and output formatting as well. For any help you can contact sql help, which is available online. Step by step oracle installation and usage guide are available on the internet and you also install directly from a website by following its guidelines. You can install oracle using these step by step instructions:

1. Log on to the computer as a member of administrative group. This will provide you the authority to install and run oracle software and database.

2. An auto run window will appear automatically after you insert the distribution CD for the database.

3. The welcome oracle universal installer window can be now found on the screen. Click the next button to begin the installation process.

4. You get an on screen dialogue page.

5. Login as root in the terminal window and run the orainstRoot.sh script. Return to the oracle universal installer page after the script finishes and click continue.

6. Select the enterprise edition or standard edition (as suited to your environment on the specify file location page which next appears. Then click next.

7. After verification by the installer click next. The verification sees to it that your system meets the minimum requirement of oracle software installation or not.

8. Click next after the specify file location page appears. You will have to select the select database configuration and specify database storage option.

8. You should then select your passwords on specify database schema passwords.

9. On the summary page select install for progress. You will the find the progress window.

10. After the database creation process is completed, page containing information about the database appears which should be reviewed carefully. You can then manage your passwords or can click ok.

11. The end of installation page shows the completion of the process. You should note down the web application port numbers and click yes to exit.

Oracle’s advanced features

The upgraded oracle 11g has some advanced features like solid enhancements in RAC, RMAN, data guard and data pump. Enhancements are also present in java, xml, php and pl/sql. It has increase security compliance and easy data portioning and warehousing. The cost of ownership is reduced along with easy management of databases. Information lifecycle management is also present.