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Howto: Clean a mysql InnoDB storage engine?
Is it possible to clean a mysql innodb storage engine so it is not storing data from deleted tables?
2 Answers
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SQL - using alias in Group By
...OUP BY is executed before the SELECT clause.
There are exceptions though: MySQL and Postgres seem to have additional smartness that allows it.
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不到20个积木块，我用App Inventor 2给女儿做了个接星星小游戏 - App应用开...
...边缘数值是 -1（南/底部），就理解是"没接住"，重置位置重新掉落。
最终效果
最终成品是一个完整的"接星星"小游戏：
• 金色星星不断从顶部落下
• 手指拖动底部篮子左右移动
• 接住星星播放音效加1...
Serializing object that contains cyclic object value
...which is objects with the special $ref property. Let's see how that works.
root = makeToolshed();
[root.bolt === root.nut.needs, root.nut.needs.needs === root.nut]; // retutrns [true,true]
The dollar sign stands for the root. .bolt having $ref tells us that .bolt is an "already seen" object, and th...
技术人员如何去面试？ - 杂谈 - 清泛网 - 专注C/C++及内核技术
技术人员如何去面试？本文探讨的主要是如何选择公司、如何面试、如何谈薪水等实际的问题，可能描述会有偏颇，仅供参考。一、为什么跳槽和选择公司1.为什么跳槽虽...本文探讨的主要是如何选择公司、如何面试、如何谈薪...
NoSQL - MongoDB vs CouchDB [closed]
...ch, filling up disks.
For example: For most things that you would do with MySQL or PostgreSQL, but having predefined columns really holds you back.
CouchDB (1.2)
Written in: Erlang
Main point: DB consistency, ease of use
License: Apache
Protocol: HTTP/REST
Bi-directional (!) replication,
continu...
如何设置squid使外网也可以通过代理服务器上网，并且使用代理服务器的ip地...
如何设置squid使外网也可以通过代理服务器上网，并且使用代理服务器的ip地址按照配置文件内网可以通过服务器上网，显示的ip是本机ip，外网不能通过服务器，现在想让外网可以通过代理服务器，并且使用服务器的ip，请问......
How to change MySQL data directory?
Is it possible to change my default MySQL data directory to another path? Will I be able to access the databases from the old location?
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Nginx serves .php files as downloads, instead of executing them
...ttps://www.digitalocean.com/community/tutorials/how-to-install-linux-nginx-mysql-php-lemp-stack-on-ubuntu-14-04 but when I try to run some .php file it's just downloading it...
for example... http://5.101.99.123/info.php it's working but... If I go to the main http://5.101.99.123 it's downloadi...
XAMPP - MySQL shutdown unexpectedly
When I open XAMPP and click start MySQL button and it gives me an error.
I had started it just before, but now it isn't working.
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