null
<programming> A special value used in several languages to represent the
thing referred to by an uninitialised pointer.
<database> A special value that may be stored in some database columns to
represent an unknown, missing, not applicable, or undefined value. Nulls are
treated completely differently from ordinary values when evaluating SQL
expressions and there are several SQL constructs for dealing with nulls.
(2003-06-17)
Nearby terms:
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modem » null-terminated multibyte string
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