Presence Check  - Checks if the field is blank, Range Check - Checks if a field entry falls between two amounts, eg. Date of Birth, Type Check - Checks if a field entry is the correct category of data, eg, Text or Integer, Lookup Check - Selects data from a list of options, eg. Mr, Mrs etc.., Format Check - Checks whether the data entered fits a structure, eg. Post Code , Length Check - Checks if the data doesn't exceed the number of characters, e.g Mobile Number,

Data Validation rules

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