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https://issues.apache.org/jira/browse/DERBY-6103?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13607311#comment-13607311
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Dag H. Wanvik commented on DERBY-6103:
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+1 to both! WINDOW is a reserved keyword in both the standard and in Derby, 
Thanks, Kim.
                
> Improve documentation of ROW_NUMBER function
> --------------------------------------------
>
>                 Key: DERBY-6103
>                 URL: https://issues.apache.org/jira/browse/DERBY-6103
>             Project: Derby
>          Issue Type: Improvement
>          Components: Documentation
>            Reporter: Dag H. Wanvik
>            Assignee: Kim Haase
>            Priority: Minor
>
> The current documentation doesn't mention that we allow the window definition 
> to be explicit.
> The restriction on WHERE clause no longer applies, nor does the sentence 
> about ORDER BY not being allowed in subqueries. Cf. rreffuncrownumber.dita. 
> Also, the documentation mentions that we don't support LIMIT, but not that we 
> now support the FETCH/OFFSET clause, which is often a better option than 
> ROW_NUMBER.

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