Types of validation. AnnMarie Minter. Types of validation. Range check Length check Look up check Presence check Format check. Range check. Checks that a value is in a given range. Length Check. Checks that a value has a certain maximum length. Look up check.
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Checks that a value is in a given range
Checks that a value has a certain maximum length
Checks that data takes one of a set of predefined values
Ensures that data is entered into a field
0 A number 0-9 must be entered
# A number 0-9 is optional
L A letter between a-z must be entered
? A letter between a-z is optional
A A letter or a digit must be entered
a A letter or a digit is optional
& Any character (or symbol) can be entered
> Convert everything that follows to upper case
< Convert everything that follows to lower case
We combine the input mask codes, e.g.: “L????” or “0&00” or “Aaaa&&&”.