What is Oracle Database?
Oracle database is a collection of data treated as a unit. The purpose of a database is to store and retrieve related information. A database server is the key to solving the problems of information management.
In general, a server reliably manages a large amount of data in a multiuser environment so that many users can concurrently access the same data.
All this is accomplished while delivering high performance. A database server also prevents unauthorized access and provides efficient solutions for failure recovery.
Oracle Application Express (APEX) is a Web application development tool for Oracle Database.
The tool uses built-in features such as user interface themes, navigational controls, form handlers, and flexible reports to accelerate application development.
Oracle Application Express installs with the database and consists of data in tables and PL/SQL code.
When you run an application, your browser sends a URL request that is translated into an Oracle Application Express PL/SQL call.
After the database processes the PL/SQL, the results are relayed back to the browser as HTML. This cycle happens each time you request or submit a page.
Oracle Database development
Oracle Database may be licensed and deployed on-premises on a choice of platforms including Oracle Engineered Systems, and on-Cloud with a choice of services running on general-purpose hardware or Exadata.
The various editions and Cloud services provide different levels of database functionality for different use cases (e.g. dev/test, departmental and non-critical apps, mission-critical workloads) with different levels of performance, availability, etc. service levels.
- Oracle Database Cloud Services: for on-cloud and Cloud at Customer deployments.
- Oracle Database editions: mainly for on-prem deployments.
- Engineered systems such as Oracle Exadata specifically built for Oracle Database deployment (on-prem, on-cloud, Cloud at Customer).