Most order by rand mysql related news are at:
More order by rand mysql related news:
mysql随机查询数据 phpiask.com 7 May 2011 | 03:27 pm
MySQL是开放源代码，MySQL因为其速度、可靠性和适应性而备受关注。大多数人都认为在不需要事务化处理的情况下，MySQL是管理内容最好的选择。 那么如何在MySQL实现表中取出随机数据呢？ SELECT * FROM table_name ORDER BY rand() LIMIT 5; rand在手册里是这么说的: RAND() RAND(N) 返回在范围0到1.0内的随机浮点值。如果一个...
Never use ORDER BY RAND() again! pureform.wordpress.com 6 Mar 2008 | 01:27 pm
I have been guilty of using ORDER BY RAND() in MySQL queries to return random records from time to time, but everyone knows to avoid it like the plague. For those who agree with me, aside from using i...
MySQL随机查询的优化实例 uh80.com 7 Aug 2011 | 04:58 pm
MySQL随机查询的效率如果想得到提高，就需要进行优化，下面就为您介绍一个MySQL随机查询优化成功的例子，供您借鉴参考。 一直以为MySQL随机查询几条数据，就用 SELECT * FROM `table` ORDER BY RAND() LIMIT 5 就可以了。 但是真正测试一下才发现这样的MySQL随机查询效率非常低。一个15万余条的库，查询5条数据，居然要8秒以上 查看官方手册...
Order by Rand() i Symfony2 webfish.se 8 Aug 2012 | 10:30 pm
Att hämta en slumpmässig rad från en MySQL är ganska enkelt. Man lägger till ORDER BY RAND() i slutet på sin query. Nackdelen är att det går extremt långsamt. Den har en tidskomplexitet på O(n*log(n))...
MySQL ORDER BY RAND() – Qual a melhor forma de fazer? jf.eti.br 23 Aug 2013 | 09:45 am
Essa é uma dúvida que volta e meia aparece nos fóruns, como obter linhas aleatórias em uma query. Normalmente o que vemos é algo assim: SELECT * FROM tabela ORDER BY rand(); Contudo, o que muitos nã...
Свой ORDER BY в MySQL. webimho.ru 25 Aug 2013 | 11:31 pm
Продолжаем серию вопросов о mysql. Так вот, как сделать ORDER BY в MySQL так, чтобы отсортировало поля в по колонке forma по значениям полей 1,3,4,2 То есть на выходе нужно получить все поля с forma...
What is the difference between GROUP BY and ORDER BY in MySql? scriptarticle.com 4 May 2013 | 05:07 pm
What is the difference between GROUP BY and ORDER BY in MySql? Mostly this question has been asked by… The post What is the difference between GROUP BY and ORDER BY in MySql? appeared first on Scri...
ZenCart 1.5.0 Demo Site 2 prom-mart.com 8 Apr 2012 | 08:52 am
Zen Cart 1.5.0 Zen Cart 1.5.0 Demo 2 Full Demo Install with products. Mods in order installed: Data Base Back-up Mod (Backup MYSQL Plugin) Ultimate Seo URL JZ Black 2 Free Template Column Layou...
Write a simple query to get the second largest value of a table column? phpinterviewquestions.com 17 Mar 2012 | 04:54 pm
There are many ways that we can write this, But the simplest way in mysql is, SELECT * FROM country ORDER BY id DESC LIMIT 1, 1 plus there are some other methods as well, SELECT * FROM country ORD...
Convert VARCHAR as INT for sorting in MYSQL techispeaks.com 16 Mar 2012 | 07:45 am
Today i was working on a database which was more than 10 years old. My task is to fetch records form table and display based on sorting order. Here my problem is sorting column was defined as VARCHAR ...
