'Primary keys' diaporamas de présentation

Enhanced ER-diagram

CS157A Lecture 5. Enhanced ER-diagram. Prof. Sin-Min Lee Department of Computer Science. Database Modeling and Implementation Process. Ideas . ER Design . Relational Schema. Relational DBMS Implementation.

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Introduction to MIS

Introduction to MIS. Chapter 4 Database Management Systems Jerry Post. Technology Toolbox: Creating Forms in Access Technology Toolbox: Creating Database Reports Cases: Pharmaceutical Industry. Outline.

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CHAPTER 6

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Database Systems

Database Systems. DBMS Fundamental Concepts. Svetlin Nakov. Telerik Software Academy. academy.telerik.com. Manager Technical Training. http://nakov.com. Table of Contents. Database Models Relational Database Model DBMS & RDBMS Systems

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Objectives

Al- Maarefa College for Science and Technology INFO 232: Database systems Chapter 5 Advanced Data Modeling Instructor Ms. Arwa Binsaleh. Objectives. In this chapter, students will learn: About the extended entity relationship (EER) model

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C#: Introduction for Developers

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CMSC424: Database Design

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EXAMPLE

EXAMPLE. Subclasses and Superclasses. Entity type may have sub-grouping that need to be represented explicitly. Example: Employee may grouped into secretary, engineer, manager, technician, exempt and non-exempt. Sub-groups are called subclass and employee superclass

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Day 15: Access Chapter 2

Day 15: Access Chapter 2. Larry Reaves larry.reaves@mail.wvu.edu October 7, 2013. Last class. Access Overview Tables Queries Forms Reports Relationships. Tables. A table is a storage location in a database that holds related information

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Microsoft SQL Server 2008

Microsoft SQL Server 2008. From the Program menu choose: Microsoft SQL Server 2008 R2 ? SQL Server Management Studio . You may see a window indicating the MS SQL Server Management Studio is configuring for first time use. Be patient; it sometimes takes a while. .

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Database Design Activities

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Agenda

Agenda. Functional Dependencies for Relational Databases Normalization for Relational Databases. Normalization for Relational Databases. Normal Forms Based on Primary Keys Second and Third Normal Forms Boyce-Codd Normal Form.

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Mastering MySQL

Mastering MySQL. How many authors, books, and customers are in the database ? Which author wrote a certain book ? Which books were written by a certain author ? What is the most expensive book ? What is the best-selling book ? Which books have not sold this year ?

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SQL EX 2

SQL EX 2. Complex SQL. Sub query Rules. The ORDER BY clause may not be used in a sub query. The sub query SELECT list must consist of a single column name or expression, except for sub queries that use the keyword EXISTS.

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Overview: You can relate

Overview: You can relate. This course teaches you how to build relationships between your new tables. Why are relationships essential? They bring the data in your tables together so you can extract meaningful information.

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Outline

Outline. What is a Primary Key? AutoNumber primary keys Single-field primary keys Composite-field primary key About Foreign Keys Database Relationships A one-to-many relationship A one-to-one relationship A many-to-many relationship About defining relationships. What is a Primary Key?.

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The Relational Database Design

The Relational Database Design. ER- and EER-to-Relational Mapping. ER to Relational Mapping. Mapping of regular entity types Multivalued attributes Mapping of relationship Binary relationship N-ary relationship Mapping of weak entity types Mapping of specialization and generalization.

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ERD Examples

ERD Examples. Example 1. A company has several departments. Each department has a supervisor and at least one employee. Employees must be assigned to at least one, but possibly more departments.

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Seminar: Introduction to relational databases

Seminar: Introduction to relational databases. Introduction to the database field: Transforming ER models to relational schemas. Transformation. Design of Relational Tables. The conceptual model must be transformed to an implementation model, e.g. relational schemas .

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CRUD with servlets project

CRUD with servlets project. login. Servlets support various authentication mechanisms You can always code your own login as we did with php Build a table of user names and logins Provide a form to get a name and login. Query the login table. Result should be a single record.

393 views • 11 slides