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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Lesson 1 What is a database: A database is a group of data that has been organised in a table or group. This makes it easy to find data‚ but also allows you to not have any duplicates in a group. A database is used in a school or college to store students date of births. This allows the school to be able to see how old the students are. The database can also be password protected to keep the data safe. What is a flat file database: A flat database is where you have all your data in one table.
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NORMALIZATION (Breaking down of a big single table into smaller ones) 1st STEP: UNF (Un-normalized Form) – A table with repeating groups of data OrderInvoice(OrderNo‚ OrderDate‚ CustNo‚ CustName‚ CustTel‚ CustContactPerson‚ {ItemCode‚ ItemDesc‚ UnitPrice‚ Quantity}) 2nd STEP: 1NF (First Normal Form) – Remove Repeating Groups How? By creating another table for the repeated data (the ones in curly bracket) 1. OrderInvoice(OrderNo‚ OrderDate‚ CustNo‚ CustName‚ CustTel‚ CustContactPerson) – orderInvoice
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Questions Indicate whether the following statements are true or false on the student answer sheet. 1) A requirement is something a database needs to do in order to fulfill its purpose. True 2) You only need to include the most important stakeholders in the database discussions. False 3) Forms are used for gathering input. True 4) A transaction database is optimized to track transactions in real time. True 5) Data mining uses business intelligence tools and techniques on
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Course Project: AJ Davis Department Stores Natasha Unaphum MATH533: Applied Managerial Statistics September 10th‚ 2014 Professor Rolston Introduction: AJ Davis is a department store chain‚ they are trying to get to know more about their clientele and to further expand their business. A sample of 50 credit customers are selected for this research‚ information that includes‚ location (rural‚ urban or suburban)‚ Income (in $1‚000)‚ size (household size)‚ years (number
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August 4‚ 2009 What is Database Normalization? Database Normalization is a systematic way of ensuring that a database structure is suitable for general – purpose quering and normalization is the process of efficently organizing data in a database. This process was first introduced in 1970 by E.F. Codd and has since been redefined to higher normal forms. The two goals of the normalization process are: eliminating redundant data and ensuring that data dependencies make sense. These goals reduce
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something a database needs to do in order to fulfill its purpose. 2. FALSE You only need to include the most important stakeholders in the database discussions. 3. TRUE Forms are used for gathering input. 4. TRUE A transaction database is optimized to track transactions in real time. 5. TRUE Data mining uses business intelligence tools and techniques on a variety of data sources brought together in a data warehouses. 6. TRUE The domain is the focus or knowledge area of a database.
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11/30/2014 Course Project: Petrie’s Electronics Business System Analysis Chris Eden Petrie’s Electronics Case‚ Chapter 8 Questions‚ 1-5 1. Using the guidelines from this chapter and other sources‚ evaluate the usability of the page design depicted in PE Figure 8-1. This page design is general. The page is slow at loading and shows the progress of the page load on the left hand side of the page this is not a usual practice of web design. The server that the pictures are being held in seems to be
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Workshop 4 Database Administration Tools There are three types of Database Administration Tools‚ Oracle Enterprise Manger‚ Microsoft SQL Server Enterprise Manager and Sybase Central. This paper will discuss each one. The database tool and utility applications are the primary administrative components of Oracle Enterprise Manager. You can use these applications to perform most of your DBA administration tasks. Some of the design features of the applications allows you to use the graphical interface
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956 IB COMPUTER SCIENCE SL This course will introduce students to the field of computer science. Topics covered include computer and network organization‚ system fundamentals‚ computational thinking and problem-solving. The social and ethical implications of computer systems will be addressed as well as one topic from databases‚ web-programming‚ simulations or OOP programming. Students are required to develop a project and the associated documentation that solves a real-world problem of their
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