of letters‚ numbers or facts • Information: Processed data that provides value 5 © 2011 IBM Corporation Databases and DBMS • Databases • A repository of data • DBMS (Database management system) • Software system that manages databases • The terms “Database”‚ “DBMS”‚ “data server”‚ “database server” often used interchangeably to refer to a DBMS • Why a DBMS? • Security • Can handle many users with good performance • Allows for concurrency while keeping data consistent • Protects from disaster
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populated with data for a specific purpose. 2. What is DBMS? It is a collection of programs that enables user to create and maintain a database. In other words it is general-purpose software that provides the users with the processes of defining‚ constructing and manipulating the database for various applications. 3. What is a Database system? The database and DBMS software together is called as Database system. 4. Advantages of DBMS? Redundancy is controlled. Unauthorised access is restricted
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IILM-GSM DATE OF SUBMISSION- 19/01/11 REPORT ON USES OF DATA BASE IN DIFFERENT SECTORS BY MANAGERS--- DATABASE: A database is a collection of information organized to provide efficient retrieval. DBMS is a central system which provides a common interface between the data and the various front-end programs in the application. It also provides a central location for the whole data in the application to reside. Due to its centralized nature‚ the database
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BSNS106 Lecture 2 1. What is the distinction between data and information? 2. Describe the four attributes of information quality: Timeliness‚ Location‚ Form and Validity. Lecture 3 1. What is business intelligence‚ and how does it differ from just having information? 2. What is information flow? Describe each of the following directions of information flow – horizontal‚ vertical‚ incoming/outgoing. 3. Describe each of the steps presented in the slide "From Problems
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Learning Team C Database Plan for Riordan Manufacturing Material Ordering Kishan Bhagan Amir Bashir Eric Berger Shawn Chandler Debra Hanzlik University of Phoenix DBM 500 October 22‚ 2006 Facilitator: Dr. Gary Page Table of Contents Introduction Database Plan Description Database Plan Purpose Project Plan E-R Diagrams A Description of the Normalization of the Database UML Diagrams Class Diagram Use Case Sequence Diagram Database Administration Plan
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Bar with Point of Sale 3-1 3.1 Introduction 3-1 3.2 System Design Specification 3-1 3.2.1 Data Flow Diagram (DFD) 3-1 3.2.2 Entity Relationship Diagram (ERD) 3-2 3-3 3.3 Summary 3-3 Symbols for Flow Diagram 3-4 3-5 CFD (Context Flow Diagram) DFD (Data Flow Diagram) 3-7 ERD (Entity Relationship Diagram) 3-8 Performance Analysis 4-1 4.1 Introduction 4-1 4.2 Experimental 4 3-6 4-1 4.2.1 Compatibility in Operating System
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systems‚ they are not considered part of a database system. Answer: FALSE Diff: 1 Page Ref: 13 12) A database is a set of one or more computer programs that serves as an intermediary between the users and the database management system (DBMS). Answer: FALSE Diff: 2 Page Ref: 13 13) A relational
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Question 2 Briefly‚ but precisely‚ explain the difference between single-valued attributes and simple attributes. Give an example of each. Question 3 [14marks] Use the following business rules to create an ERD using UML notation. Write all appropriate multiplicities in the ERD. • A department employs many employees‚ but each employee is employed by one department. • Some employees‚ known as “rovers‚” are not assigned to any department. • A division operates many departments‚ but each department
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ready to focus on the data design of the Willow brook School’s information system. To perform the following tasks‚ refer back to the documentation given in earlier weeks and also ones you prepared from the systems analysis phase. Tasks 1. Create an ERD for the Willow brook School’s information system with relationship or cardinality notation. 2. Design fully normalized 3NF tables for the system. Use the real-world normalization examples starting on page 372 of your text that illustrates the use of
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draw a detailed ER diagram using UML notation. Write all attributes in the ERD using the format -> attribute: type. Make reasonable assumptions about data types. For the Registration table‚ explain all constraints that are necessary on the table. [25 marks] 2. Guest 1234 registers and checks in Room R25 on 14-Jan-09 (RegId = 9005). Carefully explain the referential integrity checks that the DBMS would perform when the insert statement is executed. Explain the entity integrity
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