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Validations (Presence check (Advantages and Disadvantages (Advantages,…
Validations
Presence check
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Definition.
Checks that data was entered
a error message appears if left blank
Range check
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Definition.
Check if data is between lower and upper range
E.g. 1-10 (5 would be accepted, 11 would be rejected)
Length Check
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Definition.
Checks if data is too short or too long
E.g. Password has to be 6 characters minimum
Format check
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Definition.
Checks if data is in the correct format
E.g. date is written as DD/MM/YYYY
Lookup value
Definition.
When you look for a match on a key field,to ensure the data entered is more accurate
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