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CIS 330: Applied Database Systems Lecture 7: Technologies at the Three Tiers Alan Demers ademers cs

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The document is a lecture on Applied Database Systems, focusing on Internet technologies across three tiers: the presentation layer, middle tier, and HTTP protocol. It covers key concepts such as URIs, HTML forms, cookies, JavaScript, and session tracking. The lecture explains the structure of HTTP requests and responses, differences between HTTP versions 1.0 and 1.1, and the importance of cookies for maintaining state in stateless HTTP communication.

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What is the most popular form of database today?

Oracle Database: One of the most widely used enterprise-grade RDBMSs, providing high availability and security for large organizations. Microsoft SQL Server: A relational database management system that integrates seamlessly with other Microsoft products, making it popular in business environments.

What are the three main database models?

There are 3 common types of data models: relational, hierarchical, and network database.

Which database model is the most widely used today?

The relational database model is the most used database model today. However, other database models exist with different strengths. The hierarchical database model, popular in the 1960s and 1970s, connected data together in a hierarchy, allowing for a parent/child relationship between data.

What are the three main types of database systems?

How Many Types of Databases Are There? Hierarchical Databases. Developed in the 1960s, the hierarchical database looks similar to a family tree. Relational Databases. Relational databases are a system designed in the 1970s. Non-Relational Databases. Object oriented databases.

What are the three types of data models used today?

The three primary data model types are relational, dimensional, and entity-relationship (E-R). There are also several others that are not in general use, including hierarchical, network, object-oriented, and multi-value.