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MySQL Memory Tables For Query Performance 19 Oct 2009 | 04:16 am

Using MEMORY storage engine to improve performance on a query.

MySQL – CREATE TABLE examples 12 Aug 2011 | 08:38 am

A very basic CREATE TABLE statement which should work in any SQL database:

How having many tables affects MySQL memory usage? 19 May 2012 | 12:47 am

You could say: what could be the reason for having really big number of tables? Just design the application properly! It’s not always that easy. And this post isn’t really about arguing whether hav...

Insert into multiple MySQL tables with one-to-one relationship 21 Jun 2011 | 06:14 am

I have been asked if there is a way to insert data into two MyISAM tables that connected by a one-to-one relationship in one MySQL query. For example: mysql> CREATE TABLE `user` ( `id` int(10) unsigne... was completed 12 Sep 2011 | 05:56 pm

We completed Following technologies were used. PHP MySQL AJAX Table less design CakePHP framework URL:

MySQL : Altering Huge Tables 7 Dec 2010 | 11:31 pm

You have a huge mysql table - maybe 100 GB. And you need to run alter on it - to either add an index, drop an index, add a column or drop a column. If you run the simple mysql "alter table" command, y...

MySQL: Moving table from one db to another 14 Dec 2009 | 12:42 am

To move one table from one db to another, you can create new table (create table foo_new like foo) in db where you want to move table and then copy data with insert into/select query. However there is...

MySQL – Alter table-change datatype of column with foreign key 24 Apr 2012 | 12:08 am

Schema alteration is a big headache especially when it has already reached to production and things get worse when the relations are involved. Below is a short example for altering...

Resolving ERROR 1075: Incorrect table definition; There can only be one auto column and it must be defined as a key 17 Apr 2005 | 10:51 pm

mysql> alter table test add orig_order int unsigned auto_increment; ERROR 1075: Incorrect table definition; There can only be one auto column and it must be defined as a key mysql> alter table test ad...

MySQL 复制集群动态添加 slave 13 Aug 2009 | 01:37 pm

MySQL 数据文件需要存放在 LVM 逻辑卷上才能进行如下操作。 创建快照: master 作为源: ## 对 master 进行读锁定 mysql> flush tables with read lock; ## 在新终端中(退出锁会失效)创建 MySQL 数据 逻辑卷 的快照 modprobe dm-snapshot lvcreate -l 486 -s -n mysql_sn...

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