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PL/SQL (Procedural Language/Structured Query Language) is Oracle Corporation's.

procedural extension for SQL and the Oracle relational database.

PL/SQL is available in Oracle Database (since version 6 - stored pl/sql procedures/functions/packages/triggers since version 7), TimesTen in-memory database (since version 11.2.1), and IBM DB2 (since version 9.7).

Oracle Corporation usually extends PL/SQL functionality with each successive release of the Oracle Database.

Dynamic HTML, or DHTML, is an umbrella term for a collection of technologies used together to create interactive and animated web sites by using a combination of a static markup language (such as HTML), a client-side scripting language (such as JavaScript), a presentation definition language (such as CSS), and the Document Object Model (DOM).

The application of DHTML was introduced by Microsoft with the release of Internet Explorer 4 in 1997.

JavaScript is a high-level, dynamic, untyped, and interpreted programming language.

It has been standardized in the ECMAScript language specification.

Alongside HTML and CSS, JavaScript is one of the three core technologies of World Wide Web content production; the majority of websites employ it, and all modern Web browsers support it without the need for plug-ins.

JavaScript is prototype-based with first-class functions, making it a multi-paradigm language, supporting object-oriented, imperative, and functional programming styles.

It has an API for working with text, arrays, dates and regular expressions, but does not include any I/O, such as networking, storage, or graphics facilities, relying for these upon the host environment in which it is embedded.

Ajax (also AJAX; short for asynchronous JavaScript and XML) is a set of Web development techniques using many Web technologies on the client side to create asynchronous Web applications.

With Ajax, Web applications can send data to and retrieve from a server asynchronously (in the background) without interfering with the display and behavior of the existing page.

By decoupling the data interchange layer from the presentation layer, Ajax allows for Web pages, and by extension Web applications, to change content dynamically without the need to reload the entire page.

In practice, modern implementations commonly substitute JSON for XML due to the advantages of being native to JavaScript.

A web framework (WF) or web application framework (WAF) is a software framework that is designed to support the development of web applications including web services, web resources, and web APIs.

Web frameworks aim to automate the overhead associated with common activities performed in web development.

For example, many web frameworks provide libraries for database access, templating frameworks, and session management, and they often promote code reuse.

Although they often target development of dynamic web sites, they are also applicable to static websites.