Management of Data in
Spreadsheets & Databases
SPREADSHEETS?

•A grid that organises data into cells
•Allows us to record, compare and display data efficiently and
easily...
OUR SPREADSHEET


•Created in Google Docs
•Two week record of each student’s activities rounded to the
nearest half-hour b...
RELATIONAL DATABASES


•A collection of data
•Structured
•Displayed in rows and columns, and linked to other tables
•Minim...
EXAMPLE?


•School’s student records in a particular class
•Same teacher, same home room, same class name
•This data would...
SPREADSHEETS

      Advantages               Disadvantages

       Simple to use            Repeated data


   Easy data d...
RELATIONAL DATABASES

        Advantages                       Disadvantages

  Elimination of repeated data           Dif...
CONTRAST
     Spreadsheets                Relational Databases
      Repeated data             Elimination of repeated dat...
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  1. 1. Management of Data in Spreadsheets & Databases
  2. 2. SPREADSHEETS? •A grid that organises data into cells •Allows us to record, compare and display data efficiently and easily •Can be thought of as a large calculator •Capable of simple and complex mathematical calculations •Commonly used in budgets, financial analysis, and sales forecasting
  3. 3. OUR SPREADSHEET •Created in Google Docs •Two week record of each student’s activities rounded to the nearest half-hour block of time •Consists of six categories: student, category, activity, day, time & duration in hours
  4. 4. RELATIONAL DATABASES •A collection of data •Structured •Displayed in rows and columns, and linked to other tables •Minimises duplication of data •Commonly used for school/university student records, business partnership or product records, etc.
  5. 5. EXAMPLE? •School’s student records in a particular class •Same teacher, same home room, same class name •This data would be duplicated in a spreadsheet •This data would be entered ONCE in a relational database •It would then be linked, or “related” to each student
  6. 6. SPREADSHEETS Advantages Disadvantages Simple to use Repeated data Easy data duplication Data entry errors Cell formulas & calculations Formula errors
  7. 7. RELATIONAL DATABASES Advantages Disadvantages Elimination of repeated data Difficult to set up Search, retrieval and subsets Calculations are not cell-based Tabular or other display formats Cross-platform support difficult
  8. 8. CONTRAST Spreadsheets Relational Databases Repeated data Elimination of repeated data Simple to use Difficult to set up Cell formulas & calculations Calculations are not cell-based Data entry errors Search & retrieval of data Cell format view Many display formats Graphics are easy to insert Graphics are harder to set up
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