Database concepts | Assignment 1 | | Robyn Wright | 3/27/2013 | | Contents Introduction 2 Task 1 3 1.1 Definition of database management system 3 1.2 5 Advantages of database management system 3 1.3 3 Business functions database management system could do 3 1.4 5 database management system packages 3 1.5 10 Factors when choosing a database management system 3 Task 2 5 2.1 Create a database if it does not yet exist 5 2.2 Show if the database has been
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EE4791 Database Systems 2012-13 Project (CA‚ 20%) Design and Implementation of the Database with Microsoft Access. Group assignment (1-3 persons per group): 1. Propose a database Case Study with at least 5 tables. Write down the requirements on the database. 2. Draw EER diagram. 3. Give relational model (i.e.‚ logical scheme). Normalize up to 3NF. 4. Create the tables in MS Access in Design View. Choose indexes for your query. Implement data integrity (default value‚ range values‚ etc) 5. Implement
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command? Selected Answer: SELECT HireDate‚ COUNT(*) FROM EMPLOYEE WHERE Salary < 30000; Question 9 5 of 5 points Because SQL stored procedures allow and encourage code sharing among developers‚ stored procedures give database application developers the advantages of less work‚ standardized processing‚ and specialization among developers. Selected Answer: True Question 10 5 of 5 points The SQL command used to create a virtual table is ________.
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DataBase Concepts DataBase – a collection of information related to specific entity (e.g. organization‚ bank‚ college‚ library etc.) DBMS – (Database management system) – a application through which we can control the database i.e. we can store data into database‚ update the data and delete also we can retrieve the data from database. For doing these operation DBMS support a language called Structured Query language (SQL). SQL accomplishes many powerful tasks with a mere seven statements: SELECT
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question or simply one principle that makes a design "good" or "bad". It is the intersection of the principles of design‚ as well as form and function‚ that make a good design. In his book‚ author Tim Samara has general rules for producing good design. However it was said by typographer‚ David Jury that‚ "Rules can be broken‚ but never ignored." While considering the principles of design is important‚ there are certain principles that do make a design more successful. In my opinion‚ one of these
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The importance of good logo design By Paul Turner Logo design is everywhere. It is the key element for any company’s corporate identity. It is important that as a company they ensure that the logo that is representing them is effectively designed so that people can easily identify and relate the logo to the company. If a logo is poorly designed‚ it can have a negative effect on the company it is speaking for. Bad logo design is one of the main causes of new business’ failing every year because
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Concurrency Control in Distributed Database Systems PHILIP A. BERNSTEIN AND NATHAN GOODMAN Computer Corporation of America‚ Cambridge‚ Massachusetts 02139 In this paper we survey‚ consolidate‚ and present the state of the art in distributed database concurrency control. The heart of our analysts is a decomposition of the concurrency control problem into two major subproblems: read-write and write-write synchronization. We describe a series of synchromzation techniques for solving each subproblem
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DATABASE A database is a collection of data organized to meet users’ needs. Why This Matters Without data and the ability to process it‚ an organization would not be able to successfully engage in business activities‚ nor would it be able to generate reports to support knowledgeable workers and decision makers which in turn help’s to achieve organizational goals; it would not be able to pay employees‚ send out bills‚ and order new inventory. Databases have made it possible to map the structure
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have? Ans: An "owner" account is given to those in control of specific relations. They have select‚ modification‚ and reference privileges on that given relation. 2) How is the view mechanism used as an authorization mechanism? Ans: A multiuser database system must selectively permit users to share data‚ while retaining the ability to restrict data access. There must be a mechanism to provide protection and security‚ permitting information to be accessed only by properly authorized users. Further
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Database management Homework 1 Chapter 1. Getting started A. Create a simple list of owners and properties. B. Describe modification problems. There are three problems. First is deletion problem‚ second is update problem‚ third is insertion problem. Deletion problem is when you want to delete data‚ you may lost too much data. Update problem is when you want to update data‚ the sheet may have inconsistent data. Last insertion problem is when you want to insert some data‚ you must
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