Availability Guide for Change Management

Glossary
Availability Guide for Change Management–125506
Glossary-13
unplanned outage
unplanned outage. Time during which the system is not capable of doing useful work
because of an unplanned interruption. Unplanned interruptions can include failures
caused by faulty hardware, operator error, or disaster.
view. A table derived by projecting a subset of the columns, restricting a subset of the rows,
or both, from one or more other tables and views. A view has a logical definition and a
file label but contains no actual data separate from the data in the table or tables it is
derived from.
wild-card character. A character, usually an asterisk (*) or a question mark (?), that is used
to match any character or a series of characters.