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https://issues.apache.org/jira/browse/DERBY-3550?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12579858#action_12579858
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Kim Haase commented on DERBY-3550:
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Thanks very much, Rick.
> The Reference guide says that you can create your own user-defined
> aggregates, but Derby does not have this capability.
> -----------------------------------------------------------------------------------------------------------------------
>
> Key: DERBY-3550
> URL: https://issues.apache.org/jira/browse/DERBY-3550
> Project: Derby
> Issue Type: Bug
> Components: Documentation
> Reporter: Rick Hillegas
> Assignee: Kim Haase
> Fix For: 10.4.1.0
>
> Attachments: DERBY-3550.diff, rrefsqlj33923.html
>
>
> The "Aggregates (set functions)" section of the Reference Guide says "You can
> also create your own aggregates to perform other set functions such as
> calculating the standard deviation." This is not true. See DERBY-672. This
> sentence confuses users. See the following email thread:
> http://www.nabble.com/STDDEV-for-Derby-td16038184.html#a16038184
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