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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

DISTINCT and ALL

Most aggregate functions optionally accept the DISTINCT and ALL keywords in their parameter list. These keywords allow you to control the manner in which duplicate column values are handled. The keywords have the following meanings:

DISTINCT

Causes the aggregate function to look only at distinct values, and to ignore duplicates.

ALL

Causes the aggregate function to look at all values including any duplicates. This is the default behavior.

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Publisher Resources

ISBN: 0596003366Errata Page