Glossary
V
value
(1) Smallest unit of data manipulated in SQL.
(2) A specific data item at the intersection
of a column and a row.
variable
A data element that specifies a value that
can be changed.
variant function
A user-defined function whose result is
dependent on its input parameter values as well as other factors. Successive
invocations with the same parameter values might produce different results.
Contrast with not-variant function.
varying-length string
A character, graphic, or binary string
whose length is not fixed but can range within set limits.
view
A logical table that consists of data that
is generated by a query. Contrast with base table.
Visual Explain
A tool that lets database administrators
and application programmers use a graphical interface to display and analyze
detailed information on the access plan of a given SQL statement. The tasks
provided by this tool can be accessed from the Control Center.
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