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ros 基本调试 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...的开发中，还是帮助测试ros的关键部分——你都需要了解如何生成重要的调试日志。
对于开发者来说，如果想准确地找出和判断ros的运行状态，调试信息是非常重要的。从操作系统得到默认的调试输出很容易，但是这些输出对...
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...
Convert MySql DateTime stamp into JavaScript's Date format
Does anyone know how I can take a MySQL datetime data type value, such as YYYY-MM-DD HH:MM:SS and either parse it or convert it to work in JavaScript's Date() function, for example:- Date('YYYY, MM, DD, HH, MM, SS);
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MySQL “NOT IN” query
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NOT IN vs. NOT EXISTS vs. LEFT JOIN / IS NULL in MySQL
MySQL, as well as all other systems except SQL Server, is able to optimize LEFT JOIN / IS NULL to return FALSE as soon the matching value is found, and it is the only system that cared to document this behavior.
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ImportError: No module named MySQLdb
...sion, or on a platform where you cant, you can try using the pure python PyMySQL bindings.
Simply pip install pymysql and switch your SQLAlchemy URI to start like this:
SQLALCHEMY_DATABASE_URI = 'mysql+pymysql://.....'
There are some other drivers you could also try.
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Integrating MySQL with Python in Windows
I am finding it difficult to use MySQL with Python in my windows system.
16 Answers
16...
SET NAMES utf8 in MySQL?
I often see something similar to this below in PHP scripts using MySQL
8 Answers
8
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MySQL offset infinite rows
...ble, but is offset by 5 from the start of the table. As far as I can tell, MySQL's LIMIT requires a limit as well as an offset. Is there any way to do this?
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MySQL - force not to use cache for testing speed of query
I'm testing the speed of some queries in MySQL. The database is caching these queries making it difficult for me to get reliable results when testing how fast these queries are.
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Having both a Created and Last Updated timestamp columns in MySQL 4.0
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From the MySQL 5.5 documentation:
One TIMESTAMP column in a table can have the current timestamp as the default value for initializing the column, as the auto-update value, or both. It is not possible to have the current timestamp...