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Best way to test if a row exists in a MySQL table

I'm trying to find out if a row exists in a table. Using MySQL, is it better to do a query like this: 12 Answers ...
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Sqlite or MySql? How to decide? [closed]

...buffer parts of your 1Tb database in your 32G of memory. You need to use mysql or some other server-based RDBMS. Note that MySQL is not the only choice and there are plenty of others which might be better for new applications (for example pgSQL). Sqlite is a very, very nice piece of software, bu...
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Get Insert Statement for existing row in MySQL

Using MySQL I can run the query: 15 Answers 15 ...
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MySQL select 10 random rows from 600K rows fast

...imple, to gaps, to non-uniform with gaps. http://jan.kneschke.de/projects/mysql/order-by-rand/ For most general case, here is how you do it: SELECT name FROM random AS r1 JOIN (SELECT CEIL(RAND() * (SELECT MAX(id) FROM random)) AS id) ...
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Logstash实践: 分布式系统的日志监控 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...(我还要去维护宇宙和平的好嘛)。 这篇文章讲的就是如何解决分布式系统的日志管理问题。先给大家看看最终的效果: 单个屏幕上所有服务器的日志实时滚动着显示。每条日志开头还标明日志的来源(下图)。 实现这...
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How to create relationships in MySQL

... to do what the rest of the class is doing, but with raw SQL commands with MySQL instead of using Access. 8 Answers ...
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String concatenation in MySQL

I am using MySQL and MySQL Workbench 5.2 CE. When I try to concatenate 2 columns, last_name and first_name , it doesn't work : ...
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BugTrap程序崩溃快照上传服务端开发配置 - C/C++ - 清泛网 - 专注C/C++及内核技术

...篇《BugTrap:程序崩溃快照、bug跟踪之利器》详细介绍了如何利用BugTrap监控程序崩溃,这里继续介绍如何将客户端的崩溃包上传至服务器端(当然前提是用户选择“发送报告”)。上一篇《BugTrap:程序崩溃快照、bug跟踪之利器》...
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程序员找女朋友的技术攻略:实战篇 - 杂谈 - 清泛网 - 专注C/C++及内核技术

...确需求是很难达到预期效果的。这次,我们来谈谈程序员如何找女朋友,如何找到女朋友,这里有几点战略性的建议: 一、如何搭讪 • 不要害羞 有一部分程序员“天生不够淫荡”,看到女生就会脸红,尤其是自己喜欢的...
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一张图告诉你是需要 SQL 还是 Hadoop - 大数据 & AI - 清泛网 - 专注C/C++及内核技术

...己的项目,什么时候用 SQL,什么时候用 Hadoop,它们之间如何取舍?Aaron Cordova 用一张图来回答你这个问题,对于不同的数据场景,如何选取正确的数据存储处理工具进行了详细描述。Aaron Cordova 是美国大数据分析及架构专家,Kov...