Concepts of Data Bases

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Concepts of Data Bases

  1. 1. Basic Concepts of Data Bases Presented By Danial Masood Reg #1421-310031 & Bilal Mushtaq Reg #1421-310033
  2. 2. Introduction to DatabaseA database is any organized collection of data. Some examples of databases you may encounter in your daily life are: ◦ Phone Contacts ◦ airline reservation system ◦ papers in your filing cabinet ◦ Banking Record.
  3. 3. Data vs. information: What is the difference? What is data?  What is information? ◦ Information is data that ◦ Data can be defined in have been organized many ways. Information and communicated in a science defines data as coherent and meaningful unprocessed manner. information. ◦ Data is converted into information, and information is converted into knowledge. ◦ Knowledge; information evaluated and organized so that it can be used purposefully.
  4. 4. Why do we need a database? Keep records of our: ◦ Clients ◦ Staff ◦ Volunteers To keep a record of activities and interventions; Keep sales records; Develop reports; Perform research Longitudinal tracking
  5. 5. What is the ultimate purpose of adatabase management system? Is to transform Data Information Knowledge Action
  6. 6. More about database definitionWhat is a database? A structured set of data held in a computer, especially one that is accessible in various ways.
  7. 7. Let’s explore some examples Outlook contacts  GIS-GPS systems
  8. 8. Some models about Database Non-relational database Relational database
  9. 9. Non Relational Databases Non-relational databases place information in field categories that we create so that information is available for sorting and disseminating the way we need it. Example: a spread sheet
  10. 10. Relational Database In relational databases, fields can be used in a number of ways (and can be of variable length), provided that they are linked in tables. It is developed based on a database model that provides for logical connections among files (known as tables) by including identifying data from one table in another table
  11. 11. Some Definitions A File: A group or collection of similar records, A record book: a “Hawlet Packard" of data records, like address lists, inventory lists, classes A field: one category of information, i.e., Name, Address, Semester Grade, Academic topic A record: one piece of data, i.e., one students information, a recipe, a test question A layout: a design for a database that contains field names and possibly graphics.
  12. 12. Fundamental building blocks Tables comprise the fundamental building blocks of any database. If youre familiar with spreadsheets, youll find database tables extremely similar. Take a look at this example of a table sample database:
  13. 13. Data Entry –considerations  Barcode scanners ◦ USB or ◦ Wireless attached to a Palm or Pocket PC  Pocket PC ◦ Wi-Fi 802.11g, Bluetooth ◦ Wireless networks (real-time on demand systems)

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