1 / 11

Announcements

Learn about the ANSI/SPARC 3-level DBMS model and the concept of data independence in this Database Architecture Lecture. Covers logical and physical data independence, external and internal schemas, and various data models.

camerona
Télécharger la présentation

Announcements

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Announcements • No Class Friday • Homework 1 - Due now • Project: Step 1 Due 9/17 • Reading for Monday • 2.6 – 2.8 • Homework 2 - Due 9/22

  2. Database Architecture Lecture 4

  3. ANSI/SPARC 3-level DBMS Model External Schemas logical data independence Logical Schema physical data independence Internal Schema …

  4. Rationale for separation of external and internal levels

  5. Data Independence • Logical data independence • Physical data independence

  6. Object-based data models Entity-Relationship Object-Oriented Object-Relational Record-based data models Relational Network Hierarchical Data Models

  7. Entity-Relationship Model

  8. Relational Model

  9. Object-oriented Model

  10. Object-relational model

  11. Semi-structured Model

More Related