大约有 40,000 项符合查询结果(耗时:0.0188秒) [XML]

https://stackoverflow.com/ques... 

docker mounting volumes on host

...ontainer. Example: You have a Dockerfile that defines a VOLUME /var/lib/mysql. You build the docker image and tag it some-volume You run the container And then, You have another docker image that you want to use this volume You run the docker container with the following: docker run --volumes...
https://stackoverflow.com/ques... 

Get top n records for each group of grouped results

...ould need to specify the group number and add queries for each group: ( select * from mytable where `group` = 1 order by age desc LIMIT 2 ) UNION ALL ( select * from mytable where `group` = 2 order by age desc LIMIT 2 ) There are a variety of ways to do this, see this articl...
https://www.tsingfun.com/it/bigdata_ai/1077.html 

MySQL和MongoDB设计实例进行对比 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术

...本信息,还包含了待机时间,外观设计等参数信息,应该如何存取数据呢? 如果使用MySQL的话,应该如何存取数据呢? 如果使用MySQL话,手机的基本信息单独是一个表,另外由于不同手机的参数信息差异很大,所以还需要一个...
https://stackoverflow.com/ques... 

'IF' in 'SELECT' statement - choose output value based on column values

... SELECT id, IF(type = 'P', amount, amount * -1) as amount FROM report See http://dev.mysql.com/doc/refman/5.0/en/control-flow-functions.html. Additionally, you could handle when the condition is null. In the case of...
https://stackoverflow.com/ques... 

1052: Column 'id' in field list is ambiguous

...and tbl_section which has both the id field in them. How do I go about selecting the id field, because I always get this error: ...
https://stackoverflow.com/ques... 

How do I get SUM function in MySQL to return '0' if no values are found?

... Use COALESCE to avoid that outcome. SELECT COALESCE(SUM(column),0) FROM table WHERE ... To see it in action, please see this sql fiddle: http://www.sqlfiddle.com/#!2/d1542/3/0 More Information: Given three tables (one with all numbers, one with all nul...
https://www.tsingfun.com/it/tech/2007.html 

IOS 设备忘记root密码怎么找回 - 更多技术 - 清泛网 - 专注C/C++及内核技术

IOS 设备忘记root密码怎么找回上次我拿iPhone准备登陆终端进行操作的时候发现我的root密码被修改过,但是很久没有登陆过了。于是自己改成什么密码都忘记了。最开始准备重...上次我拿iPhone准备登陆终端进行操作的时候发现我的...
https://www.tsingfun.com/it/pr... 

Jenkins配置邮件通知 - 项目管理 - 清泛网 - 专注IT技能提升

...败、构建不稳定等状态还可以发送邮件通知,现介绍一下如何在 Jenkins中配置实现邮件通知。 Jenkins内置的邮件通知并不能够满足我们,因为它无法定义发送的邮件格式,无法灵活的定义邮件接收者配置等。所以我们在使用Jenkins...
https://www.tsingfun.com/it/pr... 

Jenkins配置邮件通知 - 项目管理 - 清泛网移动版 - 专注IT技能提升

...败、构建不稳定等状态还可以发送邮件通知,现介绍一下如何在 Jenkins中配置实现邮件通知。 Jenkins内置的邮件通知并不能够满足我们,因为它无法定义发送的邮件格式,无法灵活的定义邮件接收者配置等。所以我们在使用Jenkins...
https://www.tsingfun.com/it/pr... 

Jenkins配置邮件通知 - 项目管理 - 清泛网 - 专注IT技能提升

...败、构建不稳定等状态还可以发送邮件通知,现介绍一下如何在 Jenkins中配置实现邮件通知。 Jenkins内置的邮件通知并不能够满足我们,因为它无法定义发送的邮件格式,无法灵活的定义邮件接收者配置等。所以我们在使用Jenkins...