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https://issues.apache.org/jira/browse/DERBY-2457?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12595109#action_12595109
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Andrew McIntyre commented on DERBY-2457:
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See also the discussion in DERBY-84 and DERBY-127. This bug could be
potentially be considered a dup of DERBY-84.
> Use of column aliases in group by / having clauses can cause queries to fail
> ----------------------------------------------------------------------------
>
> Key: DERBY-2457
> URL: https://issues.apache.org/jira/browse/DERBY-2457
> Project: Derby
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 10.3.1.4
> Reporter: Andrew McIntyre
> Assignee: Bryan Pendleton
> Priority: Minor
> Attachments: 1624_repro.sql
>
>
> Some use of column aliases in group by / having clauses can cause queries to
> fail with error 42X04. The queries can sometimes be made to work by also
> aliasing the table or rewriting the query to use a subselect. Attached is a
> simple sql script which reproduces the issue, originally found as part of
> DERBY-1624.
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