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MySQL/SQL: Group by date only on a Datetime column

...son. I would expect it to fail anywhere else as well. Can you confirm that MySQL actually handles this query? – Tomalak Dec 14 '08 at 15:56 1 ...
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MySQL convert date string to Unix timestamp

... You will certainly have to use both STR_TO_DATE to convert your date to a MySQL standard date format, and UNIX_TIMESTAMP to get the timestamp from it. Given the format of your date, something like UNIX_TIMESTAMP(STR_TO_DATE(Sales.SalesDate, '%M %e %Y %h:%i%p')) Will gives you a valid timestam...
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Equals(=) vs. LIKE

... operators produce obviously different results. Allow me to quote from the MySQL manual: Per the SQL standard, LIKE performs matching on a per-character basis, thus it can produce results different from the = comparison operator: mysql> SELECT 'ä' LIKE 'ae' COLLATE latin1_german2_ci; +----...
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How to convert timestamp to datetime in MySQL?

How to convert 1300464000 to 2011-03-18 16:00:00 in MySQL? 5 Answers 5 ...
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Illegal mix of collations MySQL Error

...E your_table_name CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci; MySQL sneaks swedish in there sometimes for no sensible reason. share | improve this answer | follo...
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13 个免费学习编程的好地方 - 创意 - 清泛网 - 专注C/C++及内核技术

...同,大多数企业家、威客、运营都会告诉你,学点编程能如何让自己更加成功。过去 曾几何时,懂编程的都是些顶级极客,但是现在,情况已大不相同,大多数企业家、威客、运营都会告诉你,学点编程能如何让自己更加成功...
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ATL COM开发入门(一)(JS调用ActiveX/COM组件) - C/C++ - 清泛网 - 专注C/C++及内核技术

...它进行COM开发。本文通过一个基础入门的例子,简要介绍如何定义、实现C...ATL(Active Template Library)动态模板库,是一个类库,可以使用它进行COM开发。本文通过一个基础入门的例子,简要介绍如何定义、实现COM接口,前台如何...
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ATL COM开发入门(二)(ActiveX/COM组件回调JS) - C/C++ - 清泛网 - 专注C/C++及内核技术

...OM组件回调JS)ATL回调js函数、ATL定时器使用方法、ATL后台如何获取并操作前台DOM元素。本文代码基于上篇《ATL COM开发入门(一)(JS调用ActiveX/COM组件)》。 完成的需求:后台ATL代码回调前台js函数,后台ATL启动定时器完成前台...
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代码质量:结对编程最不重要的理由 - 项目管理 - 清泛网 - 专注C/C++及内核技术

...新手开发人员加速 在与别人结对时,你不仅能观察他们如何编写代码,还能看到你的结对伙伴是如何面对整个开发流程的:发现哪里需要改变,编写测试,阅读源代码,查找文件,配置开发环境,等等。并且你还可以知道他们...
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linux ls、ll命令详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...读取权限, w : 表示修改权限, x : 表示执行权限 1)如何修改文件权限? u : 当前用户的权限, g : 当前用户组的权限, o : 当前其他用户权限 示例:a)给当前用户添加执行权限 chmod u+x text.txt b)给当前用户组添加写权...