Re: Natural sort order
От | F. BROUARD / SQLpro |
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Тема | Re: Natural sort order |
Дата | |
Msg-id | 4F4FB086.3080002@club-internet.fr обсуждение исходный текст |
Ответ на | Natural sort order (Richard Klingler <richard@klingler.net>) |
Список | pgsql-sql |
The fastest way is to create a ref table with all possible entries, ordered with an additionnal numerical column, indexing it and make a join from your table to this ref table. A + Le 17/12/2011 11:33, Richard Klingler a écrit : > Morning... > > What is the fastest way to achieve natural ordering from queries? > > I found a function at: > http://2kan.tumblr.com/post/361326656/postgres-natural-ordering > > But it increases the query time from around 0.4msecs to 74msecs... > Might be not much if occasional queries are made..but I use it for > building > up a hierarchical tree menu in a web application where every msecs > counts (o; > > > cheers > richard > > -- Frédéric BROUARD - expert SGBDR et SQL - MVP SQL Server - 06 11 86 40 66 Le site sur le langage SQL et les SGBDR : http://sqlpro.developpez.com Enseignant Arts & Métiers PACA, ISEN Toulon et CESI/EXIA Aix en Provence Audit, conseil, expertise, formation, modélisation, tuning, optimisation *********************** http://www.sqlspot.com *************************
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