Validations explained

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OCR Nationals Unit 1

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Validations explained

  1. 1. Validations
  2. 2. What is a validation?Computercheckdataenteredcompletesensible
  3. 3. Validation TypesData Type or Format checkData is the right type e.g. real or integer number,text, Memo, Yes/NoPresence checkChecks that important fields are not left blankLength Checks/ Character countFixes the number of characters you can type into afield
  4. 4. Validation TypesRange ChecksNumbers must be of a certain rangeLookup lists / Drop down listsA list containing only certain valuesInput MasksA special type of format check – data must be in aset form eg 03JAN
  5. 5. What software uses validations?• Databases• Spreadsheets• Programming software eg javascript etc

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