Re: ORDER BY
От | George Pavlov |
---|---|
Тема | Re: ORDER BY |
Дата | |
Msg-id | 8C5B026B51B6854CBE88121DBF097A865D43BB@ehost010-33.exch010.intermedia.net обсуждение исходный текст |
Ответ на | Re: ORDER BY (Alexander Staubo <alex@purefiction.net>) |
Ответы |
Re: ORDER BY
Re: ORDER BY Re: ORDER BY |
Список | pgsql-general |
> For larger tables, you may have to resort to a > union: > > select * from foo where name != 'Other' order by name > union > select * from foo where name = 'Other' Alas, this suggestion is wrong on two counts: (a) UNION expects a single ORDER BY that applies to the whole recordset and which has to come at the end; (b) UNION re-sorts anyway (it needs to eliminate the dupes) -- maybe you are thinking UNION ALL? So, to follow your advice he may want a query like this, although it seems quite silly and there still isn't an ironclad guarantee re. the final result sorting: select * from (select * from foo where name != 'Other' order by name) x union all select * from foo where name = 'Other'
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