system for managing large amounts of data. Companies use databases for many purposes: to manage customer files‚ to track orders and inventories‚ and for marketing purposes. An individual might set up a data base to track household expenses or manage a list of family‚ friends‚ and business addresses. Teachers often set up a database to track students’ grades ad other class information. A database enables the user to access and manage thousands of pieces of data in an organized‚ efficient‚ and accurate
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Microsoft-Access Tutorial Soren Lauesen E-mail: slauesen@itu.dk Version 2.4b: July 2011 Contents 1. The hotel system................................................... 4 2. Creating a database ............................................. 6 2.1 Create a database in Access ............................. 6 2.2 Create more tables ......................................... 10 2.3 Create relationships ....................................... 12 2.4 Look-up fields‚ enumeration type ..........
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.......................... 3 Audience ..................................................................................................... 3 Document purpose ...................................................................................... 3 Data model changes .................................................................................... 4 Fields deleted from the InventTrans table ................................................................................ 5 Developing new features
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CIS 276 February 5th‚ 2013 1.What is meant by data redundancy? Data redundancy is a situation that occurs within database systems and involves the unintentional creation of duplicated data that is not necessary to the function of the database. 2.What problems are associated with data redundancy? 3.What is an entity? An entity is a person‚ place‚ object‚ event‚ or idea for which you want to store and process data. An attribute‚ field‚ or column is a characteristic or property of an entity.
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It is used to make sure that data doesn’t get orphaned. 5. What restrictions does referential integrity place on the way data is entered into tables? Once the tables are created and the relationship is established‚ the data can be entered. In general‚ data can be placed in tables containing foreign keys only after the data is entered into the tables that they reference. This restriction means that data must be inserted first into the MEMBER table. If not‚ the data for the VISIT table will be rejected
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era of big data Manage‚ optimize and increase availability of your IBM DB2 for Linux‚ UNIX and Windows database and applications— delivering valuable intelligence to help your business users make informed decisions‚ fast Database management solutions for the era of big data 1 Introduction Accelerate development 2 Optimize performance 3 4 Increase availability 5 Give your business a competitive edge Database management solutions for the era of big data Introduction
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Data mining and OLAP are the most common Business Intelligence technologies. The term Business Intelligence refers to computer based methods to identify and extract useful information from business data. Online Analytical Processing commonly known as OLAP provides summary data and generates rich calculations. OLAP is a class of systems that provide answers to multidimensional queries. OLAP is typically used in business reporting for sales‚ marketing and various such domains. OLAP enables the users
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following benefits to organizations: a. Data integration b. Data sharing c. Reporting flexibility d. Minimal data redundancy and inconsistencies e. Data independence f. Central management of data g. Cross-functional analysis 6. The DBMS handles the link between the physical and logical views of the data. a. Allows the user to access‚ query‚ and update data without reference to how or where it is physically stored. b. The user only needs to define the logical data requirements. 7. Schemas a. A
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focus clearly & effectively. System emphasizing a fair degree of integration and a holistic view; Information stressing on processed data in the context in which it is used by end users; Management focusing on the ultimate use of such information systems for managerial decision making. The Concept of MIS Processing Logic Computers Data Data Data Human Beings Database Information Judgement / Intution Skill / Experience External Environment Decision Intelligence Design Choice
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Technology School of Accounting and Management‚ Trinidad‚ W.I. Table of Contents Task 1 1 Entity Relationship Diagram 1 Normalization 4 Data Dictionary 6 Task 2 10 2.1 Implementation and Data 10 2.2 Inserting data into tables for Members and Countries 16 2.3 Inserting Data for the Organizations; Assign Members to Organizations 18 2.4 Data on Qualification and Topic 20 2.5 Query – Select all the Organizations and Members 23 2.6 Query – Selects all Member’s Qualifications and
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