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The Relational Model

The Relational Model

The Relational Model. Relation. Definition: A relation is a named, two-dimensional table of data Table consists of rows (records) and columns (attribute or field) Requirements for a table to qualify as a relation: It must have a unique name

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497 views • 37 slides
Data Storage Formats

Data Storage Formats

Data Storage Formats. Files Electronic lists of data that have been optimized to perform a particular transaction Databases Logical groupings of data that are related to each other . Data Design. File oriented system Data files are designed to fit individual systems

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906 views • 36 slides
Status on the Mapping of Metadata Standards

Status on the Mapping of Metadata Standards

Status on the Mapping of Metadata Standards. ISO/IEC 11179, SDMX, and Others. Arofan Gregory, Executive Manager Open Data Foundation, Inc. METIS Meeting, Luxembourg, April 9-11, 2008. Overview. Introduction The Mapping Challenge Status of the Mappings On-Going Work Summary.

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484 views • 23 slides
Lesson 32: Designing a Relational Database

Lesson 32: Designing a Relational Database

Lesson 32: Designing a Relational Database. Lesson Objectives. After studying this lesson, you will be able to: Identify and apply principles for good relational database design Modify field settings and create Lookup fields that return multiple values Create a split form

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367 views • 21 slides
D111-Data Fundamentals

D111-Data Fundamentals

D111-Data Fundamentals. Week 5. Objectives. Recap Primary Keys Foreign Keys Data Dictionary Creating the Tables in MS Access Creating relationships in MS Access. Problem Statement.

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433 views • 19 slides
Homework 5 Hints

Homework 5 Hints

Homework 5 Hints. Read!. Please Read pages 68-70 before completing Homework #5!!. Chapter 7 Guided Exercise. Orders Database Step 4 Add TA record Expand in datasheet view and add an order record Step 5 If you do not remember what a primary key is see chapter 6 Step 7

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323 views • 19 slides

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