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Oracle in a Nutshell
book

Oracle in a Nutshell

by Rick Greenwald, David C. Kreines
December 2002
Intermediate to advanced content levelIntermediate to advanced
928 pages
85h 29m
English
O'Reilly Media, Inc.
Content preview from Oracle in a Nutshell

STDDEV

STDDEV ([DISTINCT | ALL] expr) [OVER (analytic_clause)]

Computes the sample standard deviation of the values of a column or expression over the set of rows returned by a query or the set of rows specified by a GROUP BY clause. The sample standard deviation uses the number of rows returned by the query in the denominator. STDDEV is similar to STDDEV_SAMP, but this function returns 0, rather than NULL, when expr returns only one row.

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Publisher Resources

ISBN: 0596003366Errata Page