Most order by id desc related news are at:
More order by id desc related news:
Why Arel? magicscalingsprinkles.wordpress.com 29 Jan 2010 | 12:35 pm
The upcoming version 3 of Ruby on Rails will feature a sexy new querying API from ActiveRecord. Here is an example: User.order('users.id DESC').limit(20).includes(:items) You can see that all querie...
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...
高效的MySQL分页 086php.com 26 Oct 2012 | 07:41 am
PERCONA PERFORMANCE CONFERENCE 2009上，来自雅虎的几位工程师带来了一篇”Efficient Pagination Using MySQL“的报告，有很多亮点，本文是在原文基础上的进一步延伸。 首先看一下分页的基本原理： mysql> explain SELECT * FROM message ORDER BY id DESC LIMIT 10000, 20\G...
MySQL Select Last n Records Without Changing The Order enghiong.com 17 Apr 2012 | 03:42 am
Let’s say I am going to select the last 10 records of a table. The main consideration would be using the query: SELECT recordId FROM myTable ORDER BY recordId DESC LIMIT 10 The above query would ...
Finding the Nth Highest Salary from table vijayk.wordpress.com 2 Jun 2007 | 05:41 pm
This is the most common question asked in every interview for the database. As I am more familiar with mysql , Its so simple with the following query SELECT * FROM employee ORDER BY salary DESC LIMIT...
ACCESS和MSSQL 如何隨機讀取資料庫記錄 tank.tw 3 May 2012 | 03:11 pm
查詢語句只要這樣寫,就可以隨機取出記錄了 SQL="Select top 10 * from userID where activekey = 1 and layer = 1 order by newID() desc" 在ACCESS裡 Select top 10 id from userID order by rnd(id) SQL Server： Select TOP N * fr...
mysql order by asc desc 优化 mysqlinfo.com 14 Jun 2012 | 10:22 am
今天遇到个问题 mysql 有种sql语句查询效率不高,用完索引后仍然有filesort排序 select * from table_name where a=xx order by b asc,c desc; 开始觉得可能用索引就可以解决比如 建立 create index idx_x on table_name(a,b asc,c desc); 后来发现仍然不走索引，是mysql的一个b...
MySQL Select Last n Records Without Changing The Order enghiong.com 16 Apr 2012 | 11:42 pm
Let's say I am going to select the last 10 records of a table. The main consideration would be using the query: SELECT recordId FROM myTable ORDER BY recordId DESC LIMIT 10 The above query would selec...
MySQL语法: group by的默认顺序 dbahacker.com 8 Jan 2013 | 03:36 pm
飞影 17:31:25select * from (select * from ….. order by a desc, b desc, c desc) group by a desc 哥，像我上面那个语句， 子select里面对a，b，c进行了ordery排序外面的根据aa进行了group byaa重复的数据里面，a和b是相同的，就c不同这个sql会打乱先a和b的orderby顺序结果吗？？ 一...
DeDeCMS循环调用二级栏目 bloghuman.com 2 Jun 2013 | 06:20 pm
XML/HTML代码 {dede:channelartlist typeid='20'} {dede:field name='typename'/} {dede:sql sql='Select * from `dede_arctype` where reid=~id~ and ishidden=0 ORDER BY id'} [field:typename/] {/dede:sql} ...
