# Relational data model

Xem 1-20 trên 167 kết quả Relational data model
• ### Database System: Chapter 2 - The Relational Data Model & SQL

Database System: Chapter 2 - The Relational Data Model & SQL includes about Relational Model Concepts, Relational Model Constraints and Relational Database Schemas, Update Operations and Dealing with Constraint Violations, Basic SQL.

• ### Lecture Database systems: Relational Data Model (1) – Nguyễn Ngọc Thiên An

Upon completion of this lesson, the successful participant will be able to: Overview of Relational Data Model, ER and EER-to-Relational mapping, relational algebra. Inviting you to refer lecture for more information.

• ### Lecture Database systems: Relational Data Model (2) – Nguyễn Ngọc Thiên An

This chapter introduce ER- & EER-to-Relational Mapping. Upon completion of this lesson, the successful participant will be able to: Overview of Relational Data Model, ER and EER-to-Relational mapping, relational algebra. Inviting you to refer lecture for more information.

• ### Lecture Database - Chapter 5: The relational data model and relational database constraints

Chapter 5 - The Relational Data Model and Relational Database Constraints present contents as: Relational model concepts, relational model constraints and relational database schemas, update operations and dealing with constraint violations.

• ### Lecture Database systems: Relational Data Model (3) – Nguyễn Ngọc Thiên An

This chapter introduce Relational algebra . After completing this chapter, students will be able to: relational operations unary , relational algebra operations from set theory, binary relational operations, additional relational operations , brief introduction to relational calculus.

• ### Chương 3: Mô hình quan hệ (Relational Data Model)

Khi chỉ đề cập đến thuộc tính của quan hệ thì người ta gọi quan hệ là lược đồ quan hệ. Ký hiệu: R(A1, A2, ..., An). Một lược đồ CSDL gồm có nhiều lược đồ quan hệ. R(A1, A2, ..., An) là lược đồ quan hệ cấp n.

• ### The UML and Data Modeling

The UML can be used to describe the complete development of relational and object relational databases 1 from business requirements through the physical data model. However, modeling of the physical data model must express a detailed description of the database. This is done using Rational’s Data Modeling Profile for the UML2 .

• ### Báo cáo khoa học: "A Flexible Stand-Off Data Model with Query Language for Multi-Level Annotation"

We present an implemented XML data model and a new, simpliﬁed query language for multi-level annotated corpora. The new query language involves automatic conversion of queries into the underlying, more complicated MMAXQL query language. It supports queries for sequential and hierarchical, but also associative (e.g. coreferential) relations. The simpliﬁed query language has been designed with non-expert users in mind.

• ### Chapter 4: Object-Oriented Data Modeling

Chapter 4: Object-Oriented Data Modeling includes about Introduction, UML Language, Object-Oriented Modeling, Object Modeling Example, Tranform Class Diagram to Relational Database Schema and some thing else.

• ### Database Systems: Lecture 4 - Nguyen Thanh Tung

Database Systems: Lecture 4 - Relational Data Model and ER-/EER-to-Relational Mapping provides about Relational Data Model, ER-/EER-to-Relational Mapping, Relational Integrity Constraints, Update Operations on Relations, Main Phases of Database Design.

• ### Lecture Database - Chapter 3: Data modeling using the Entity-Relationship (ER) model

In software engineering, an Entity–Relationship model (ER) is a data model for describing the data or information aspects of a business domain or its process requirements, in an abstract way that lends itself to ultimately being implemented in a database such as a relational database.

• ### Lecture Database system: Chapter 4 - Lê Thị Bảo Thu

Chapter 4 presents Relational Data Model and ER/EER-to-Relational Mapping. Upon completion of this lesson, the successful participant will be able to: Relational Data Model, main phases of database design, ER-/EER-to-Relational Mapping. Inviting you to refer.

• ### The Relational Data Model and Relational Database Constraints

The relational Model of Data is based on the concept of a Relation. A Relation is a mathematical concept based on the ideas of sets. The strength of the relational approach to data management comes from the formal foundation provided by the theory of relations. We review the essentials of the relational approach in this chapter.

• ### Lecture Fundamentals of Database Systems - Chapter 5: The relational data model and relational database constraints

In this chapter, The contents concentrate on describing the basic principles of the relational model of data, begin by defining the modeling concepts and notation of the relational model, discussion of relational constraints that are considered an important part of the relational model and are automatically enforced in most relational DBMSs, defines the update operations of the relational model,...

• ### Pro Entity Framework 4.0

In July 2008 Microsoft released the first version of the ADO.NET Entity Framework as part of the Visual Studio 2008 Service Pack 1 as well as the .NET Framework 3.5 Service Pack 1. At the time, Microsoft LINQ (Language Integrated Query) and LINQ to SQL had been out for a while and were gaining a lot of attention.

• ### overview of data modeling and database design

Before you build your tables, you design your database. In this lesson, you examine the data modeling process and relational database concepts, and define normalization. You also translate an entity relationship model into a relational database design. At the end of this lesson, you should be able to  Describe the stages of system development.  List and define basic types of data relationships.  Define a relational database and its components.  Read an entity relationship model.  Translate an entity relationship model into a relational database design....

• ### Trắc nghiệm phân tích và thiết kế hệ thống

Câu 1: A problem soling technique that decomposes a system its component parts while focusing on the business problem independent of technology is: a. Cause-and-effect analysis. b. System design. c. Joint application design(JAD). d. Systems analysis. Câu 2: A database is an organized collection of ____ related data. a. None of the others answers. b. logically. c. not. d. physically.

• ### Database System Concepts and Architecture

Data Model: A set of concepts to describe the structure of a database, and certain constraints that the database should obey. Data Model Operations: Operations for specifying database retrievals and updates by referring to the concepts of the data model. Operations on the data model may include basic operations and user-defined operations.

• ### Pro SQL Sever 2012 Relational Database Design and Implementation

I often ask myself, “Why do I do this? Why am I writing another edition of this book? Is it worth it? Isn’t there anything else that I could be doing that would be more beneficial to me, my family, or the human race? Well, of course there is. The fact is, however, I generally love relational databases, I love to write, and I want to help other people get better at what they do. When I was first getting started designing databases, I learned from a few great mentors, but as I wanted to progress, I started looking for material on database design, and...