Examlex
Which one of these is a correct definition?
Data Type
A classification indicating the kind of value a variable or field can hold in programming and data storage, such as integer, string, or date.
Null
A value used in databases to represent missing or undefined data.
City field
A specific field in databases or forms designated for entering or displaying a city's name.
Null Values
Special markers in databases designated for fields with unknown or inapplicable information.
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