Validating information

25-Mar-2020 12:06

For example the delivery date cannot be before the order date.

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Consistency check ensures that the entered data is logical.The rules may be implemented through the automated facilities of a data dictionary, Data validation is intended to provide certain well-defined guarantees for fitness, accuracy, and consistency for any of various kinds of user input into an application or automated system.Data validation rules can be defined and designed using any of various methodologies, and be deployed in any of various contexts.For example, a US phone number should have 10 digits and no letters or special characters.

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Code and cross-reference validation includes tests for data type validation, combined with one or more operations to verify that the user-supplied data is consistent with one or more external rules, requirements, or validity constraints relevant to a particular organization, context or set of underlying assumptions.

The difference between data validity and accuracy can be illustrated with a trivial example.