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Chapter 9. Understanding Query Operators... > Creating Access Expressions

Creating Access Expressions

Chapter 5 uses several functions to validate data entry for most fields in the Personnel Actions table. Chapter 8 uses an expression to select the states to be included in a mailing-list query. These examples provide the foundation on which to build more complex expressions that can define more precisely the validation rules and query criteria for real-life database applications.

See Validating Data Entry for examples using functions to help restrict data entry.


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