| From: | "Aaron Bono" <postgresql(at)aranya(dot)com> |
|---|---|
| To: | "Klay Martens" <kmartens(at)wol(dot)co(dot)za> |
| Cc: | patrick(dot)jacquot(at)anpe(dot)fr, cadiolis(at)gmail(dot)com, pgsql-sql(at)postgresql(dot)org |
| Subject: | Re: Am I crazy or is this SQL not possible |
| Date: | 2006-06-02 15:23:30 |
| Message-ID: | bf05e51c0606020823n4cf643dakccd752666000a4d6@mail.gmail.com |
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| Thread: | |
| Lists: | pgsql-sql |
Only if you assume that ordering by unique_id and by date_sent are
equivalent. That may be the case but I personally hate making assumptions
like that. When someone goes into the database and updates records (clean
up bad data, etc.) your perfectly running query can suddenly produce bad
results.
-Aaron
On 6/2/06, Klay Martens <kmartens(at)wol(dot)co(dot)za> wrote:
>
>
> Sorry to stick my nose in here...
> would not this work better?
>
> SELECT broadcast_id,date_sent,status from broadcast_history where
> unique_id in (
> SELECT max(unique_id) from broadcast_history group by broadcast_id);
>
> Seems like a simpler option.
>
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