Review of Major DB Concepts • Data and Information – Data: raw facts – Information: processed data • • • • Database Metadata DBMS: Database management system Database system 1 An Example of Data • Sales per employee for each of Xcompany’s two divisions 2 Data and Its Structure • Data is actually stored as bits, but it is difficult to work with data at this level. • It is convenient to view data at different levels of abstraction. • Schema: Description of data at some level.
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Data modeling -a technique for organizing and documenting a system’s data. Sometimes called database modeling. Entity relationship diagram (ERD) – a data model utilizing several notations to depict data in terms of the entities and relationships described by that data. 8 Data Modeling Concepts: Entity Entity a class of persons, places, objects, events, or concepts about which we need to capture and store data. –Named by a singular noun Persons: agency, contractor, customer, department
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Unit 2 Assignment 1: Homework Learning Objectives and Outcomes Review documents to discover relevant entities and attributes for database. Prepare interview questions and follow up. Prepare questionnaires. Observe work flow for process and exceptions. Identify the issues with the current database. Define and list requirements of a database. Define business rules of a database. Define entities and attributes of a database. Identify candidate keys for entities of a database. Assignment
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|[pic] |Course Syllabus | | |College of Information Systems & Technology | | |DBM/380 Version 9 | |
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STRAYER UNIVERSITY Enterprise Technology Process Models – CIS 521 Midterm Exam Quarter: May 2007 Instructor: Prof. Mort Anvari (202) 294-4230 Morteza@Anvari.net Class Web Site: http://www.anvari.net 1. How has the modern enterprise architectures changed from the early network solutions of the 1970s? The modern enterprise architectures has changed from the early network solution in that the early solution followed by vertical, hierarchial approach versus the modern
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Section A: Multiple Choices: 1. Structured Query Language (SQL) is the language for working with b. RDBMS 2. Decomposition in database design means a. Breaking one table into multiple tables 3. Locking helps b. To solve concurrency problems 4. Database optimizer b. Minimizes the speed of query execution 5. Data is __________. a. Raw facts 6. Mobile computing means d. None of the above 7. Operation Data Store (ODS) provides c. Both (a) & (b) 8. Transaction is c. Logical
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12 to 20 by agents or scouts. High fashion modeling agencies often demand height and body shape requirements and have strong preferences for standards. With cultural diversification of the Western world, ethnic diversity is becoming an important factor for all people in the modeling industry. Moreover, various races and backgrounds are becoming progressively noticeable. Anita Norris needs to be aware of the changing demographic trends in the modeling industry Technological Factors With
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Section 1 1. The study of computer based Information Systems (IS) is not just limited to traditional computers and servers, but also includes such devices as: a. Network Routers b. Mobile Phones c. Telecommunication Switches d. All of the Above 2. Information Technology (IT) refers only to the information processing software programs of a computer system: True or False 3. Information Systems are used in the business world to support an organization’s: a. Decision Making b. Business
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The Role of Analysts and Designers The primary role of systems analysts and designers is, of course, to produce a computer system solution to a problem that meets the customer’s requirements. This task can easily be so absorbing in itself that there is seemingly no time left over for thinking about the non-technical issues surrounding the introduction of a new IT system, much less for setting up a people project to address them. So even if the people project is not driven by analysts, designers
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Relational Database Management Systems TVSN Murthy Assistant Professor – DFT NIFT Hyderabad Disclaimer: These slides are just for the purpose of easy reading and are not comprehensive in nature. Thus the slides have to be read together with the class lectures, reading material, and statutes dealing with the subject RDBMS/Slide 1 Introduction Flat files - 1960s - 1980s Hierarchical – 1970s - 1990s Network – 1970s - 1990s Relational – 1980s – present Object-oriented – 1990s – present Object-relational
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