Re: SELECT DISTINCT ON removes results - Mailing list pgsql-general

From Guyren Howe
Subject Re: SELECT DISTINCT ON removes results
Date
Msg-id 1899F60F-A8F6-41A0-9A56-1A7C824A0E56@gmail.com
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In response to Re: SELECT DISTINCT ON removes results  (Guyren Howe <guyren@gmail.com>)
Responses Re: SELECT DISTINCT ON removes results  ("David G. Johnston" <david.g.johnston@gmail.com>)
List pgsql-general
On Oct 28, 2016, at 14:15 , Guyren Howe <guyren@gmail.com> wrote:

On Oct 28, 2016, at 13:50 , David G. Johnston <david.g.johnston@gmail.com> wrote:

​On its face the statement "DISTINCT ON removes results" is not at all surprising given its definition.

What is surprising is that it removes *all* results…

The inner query on its own appears to produce the same results, but the left join with it in either case produces different results.

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