Create a Data Model (CIE IGCSE ICT)

Revision Note

Becci Peters

Expertise

Computer Science

Create a Data Model

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  • A spreadsheet is made of cells, rows and columns
  • A cell is one box on the spreadsheet and is referenced using its cell reference (e.g. A1)
  • A row goes across and is referenced using the number down the side
  • A column goes down and is referenced using the letter at the top

Inserting and Deleting Cells, Rows, and Columns

  • You can alter the structure of a spreadsheet by inserting or deleting cells, rows, and columns
  • This flexibility allows you to manage and organise your data effectively

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Merging Cells

  • Merging cells combines two or more cells into one larger cell
  • This is useful for creating headers or titles that span across multiple columns

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Creating Formulae Using Cell References

  • Formulae allow you to perform calculations on your data
  • You can reference specific cells in your formulae to make them dynamic and adaptable

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Replicating Formulae Using Absolute and Relative Cell References

  • Absolute cell references ($A$1) stay constant, while relative cell references (A1) change when you copy or drag a formula

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  • Use absolute references when you want the same cell referenced and use relative references when you want the reference to change

Use of Arithmetic Operators in Formulae

  • Arithmetic operators allow you to perform basic mathematical operations in your formulae: add (+), subtract (-), multiply (*), divide (/), and indices (^)

Using Named Cells and Named Ranges

  • Named cells:
    • Easily refer to a group of adjoining cells
    • Shortens/simplifies formulae
    • Enables referring to a group of cells without having to lookup cell references
    • Don’t have to re-set the absolute referencing manually

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Worked example

Tawara school has a shop that sells items needed by pupils in school. Part of a spreadsheet with details of the items is shown.

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a. Write down the number of rows that are shown in the spreadsheet that contain text.

[1]

6 rows [1]

b. Write down the number of columns that are shown in the spreadsheet that contain text.

[1]

8 columns [1]

Exam Tip

  • Make sure you know which way round rows and columns are - rows go across and columns go down

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Becci Peters

Author: Becci Peters

Becci has been a passionate Computing teacher for over 9 years, teaching Computing across the UK helping to engage, interest and develop confidence in the subject at all levels. Working as a Head of Department and then as an educational consultant, Becci has advised schools in England, where her role was to support and coach teachers to improve Computing teaching for all. Becci is also a senior examiner for multiple exam boards covering GCSE & A-level. She has worked as a lecturer at a university, lecturing trainee teachers for Computing.