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https://issues.apache.org/jira/browse/CALCITE-5347?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Julian Hyde updated CALCITE-5347:
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Summary: Add 'SELECT ... BY', a syntax extension that is shorthand for
GROUP BY and ORDER BY (was: Add 'SELECT ... BY', a syntax extension to
eliminate duplicates and sort)
> Add 'SELECT ... BY', a syntax extension that is shorthand for GROUP BY and
> ORDER BY
> -----------------------------------------------------------------------------------
>
> Key: CALCITE-5347
> URL: https://issues.apache.org/jira/browse/CALCITE-5347
> Project: Calcite
> Issue Type: Bug
> Reporter: Julian Hyde
> Priority: Major
>
> Many people have observed that SQL query syntax is verbose if you want to
> eliminate duplicates and sort. Business intelligence tools often have query
> languages that eliminate duplicates and sort by default; we cannot do that in
> the SQL {{SELECT}} expression, because that would break compatibility. But we
> propose the following variation of {{SELECT}} that is distinguishable from
> regular {{SELECT}} (i.e. queries that use it would be invalid in ordinary
> SQL) but concise and intuitive.
> We propose
> {code:java}
> SELECT a BY b
> FROM t {code}
> as syntactic sugar for
> {code:java}
> SELECT b, a
> FROM t
> GROUP BY b
> ORDER BY b{code}
> In the above, {{a}} and {{b}} may be lists of columns, the columns may
> include aliases, and the columns in {{b}} may include sort-key modifiers such
> as {{DESC}} and {{{}NULLS LAST{}}}.
> This feature was inspired by [Shakti|https://shakti.com/], a SQL-like
> language by Arthur Whitney, author of the k language.
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