Database Design Paper “A database is a structured collection of records or data that is stored in a computer system. In order for a database to be truly functional‚ it must not only store large amounts of records well‚ but be accessed easily. In addition‚ new information and changes should also be fairly easy to input.” (tech-faq.com); to ensure usefulness over the long-term‚ databases should be built with high data integrity and the ability to recover data if the hardware fails. Information that
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Database Processing‚ 13e (Kroenke/Auer) Chapter 9: Managing Multiuser Databases 1) Database administration tasks have to be performed for single-user‚ personal databases. Answer: TRUE Diff: 3 Page Ref: 396 2) Database administration is more important but less difficult in multiuser database systems than in single-user database systems. Answer: FALSE Diff: 2 Page Ref: 396 3) In general‚ the overall responsibility of the DBA is to facilitate the development and use of the database system
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Chapter 11 Relational Database Design Algorithms and Further Dependencies Chapter Outline 0. Designing a Set of Relations 1. Properties of Relational Decompositions 2. Algorithms for Relational Database Schema 3. Multivalued Dependencies and Fourth Normal Form 4. Join Dependencies and Fifth Normal Form 5. Inclusion Dependencies 6. Other Dependencies and Normal Forms DESIGNING A SET OF RELATIONS Goals: Lossless join property (a must) Algorithm 11.1 tests
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Files and Relational Databases What is a file? • contains groups of records used to provide information for operations‚ planning‚ management and decision making. • can be used for storing data for an indefinite period of time‚ or they can be used to store data temporarily for a specific purpose. FILE TYPES • Master Files -- contain records for a group of entities. The attributes may be updated often‚ but the records themselves are relatively permanent. These files
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1 Database Design and Implementation Candidate Name: Course Name: Date of Submission: Authorization: MAY MYAT SWE Database Design and Implementation 7‚ April 2012 University of Greenwich June 2012 KMD Yangon Center MAY MYAT SWE 2 Database Design and Implementation Table of Contents No Description Page Assumption ........................................................................................ 3 1. 2. 3. 4. 5. 6. Conceptual Data Model ........................
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DATABASE DEVELOPMENT FOR AH CHAI MINI CINEMA INTRODUCTION Ah Chai Mini Cinema is a mini cinema. Even though it just a small cinema‚ but it gives the best service and provide quality movie at the good rate. From our observations‚ the cinema has been using conventional filling system to store information about their customers‚ movies and tickets. It requires a lot of files to keep the data. When there are a lot of file‚ it is difficult for the librarians to search for the data when needed
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Access Case: Dentist’s Office Brief: You will create an Access Relational Database for a dentist’s office. Database Objects: Tables: 1. Patients – keeps a track of patient information (Create at least 7 patients). 2. Dental Procedures – The dentist has 5 procedures. Procedure No. Procedure Type Rate 1 Cleaning Rs.1000.00 2 Crown Rs. 2000.00 3 Filling Rs. 2000.00 4 Root Canal Rs. 3000.00 5 X-Ray Rs. 700.00 3. Appointment – keeps a track of the each appointment‚ Patient‚ Date
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files‚ along with the details of the interpretation of the data. A Data Base ManagementSystem is a software system or program that allows access to data contained in a database. The objective of the DBMS is to provide a convenient and effective method of defining‚ storing‚ and retrieving the information stored in the database. The database and databasemanagementsystems have become essential for managing business‚ governments‚ schools‚ universities‚ banks etc. 1.2 BASIC DEFINITIONS AND CONCEPTS In
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DNA databases In 1992‚ The United States‚ Federal Bureau of Investigation funded the Combined DNA Index System (CODIS). It is a computer system that stores DNA profiles created by federal‚ state‚ and local crime laboratories in the United States‚ with the ability to search the database in its entirety; it also helps agencies identify suspects of crime. The origin of CODIS is attributed to the Scientific Working groups (SWG) that began in the late 80’s. SWG was backed by the FBI Laboratory which
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characters in a character set but of definable variable length.Stores binary string values in hexadecimal format. BLOB is defined to be a variable length. (Oracle also has CLOB and NCLOB‚ as well as BFILE for storing unstructured data outside the database.) | Number | NUMERICINTERGER(INT) | Stores exact numbers with a defined precision and scale.Stores exact numbers with a predefined precision and scale of zero | Temporal | TIMESTAMPTIMESTAMP WITH LOCAL TIME ZON | Stores a moment an event occurs
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