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Get environment variable value in Dockerfile
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add -e key for passing environment variables to container.
example:
$ MYSQLHOSTIP=$(sudo docker inspect -format="{{ .NetworkSettings.IPAddress }}" $MYSQL_CONRAINER_ID)
$ sudo docker run -e DBIP=$MYSQLHOSTIP -i -t myimage /bin/bash
root@87f235949a13:/# echo $DBIP
172.17.0.2
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Windows: XAMPP vs WampServer vs EasyPHP vs alternative [closed]
...o, but I want to open it up further to include all possible Windows/Apache/MySQL/PHP stacks.
5 Answers
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How do I check if an index exists on a table field in MySQL?
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Use SHOW INDEX like so:
SHOW INDEX FROM [tablename]
Docs: https://dev.mysql.com/doc/refman/5.0/en/show-index.html
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MySQL - How to select data by string length
Is there a MySQL function to do this (of course instead of string_length )?
6 Answers
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How is Docker different from a virtual machine?
...e host, see superuser.com/questions/889472/…. However, to illustrate the union filesystem of the containers, there could be a shared layer of libs/bins directly above the docker engine.
– Betamos
Dec 5 '15 at 1:33
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Is it possible to roll back CREATE TABLE and ALTER TABLE statements in major SQL databases?
...tive.
Is DDL transactional according to this document?
PostgreSQL - yes
MySQL - no; DDL causes an implicit commit
Oracle Database 11g Release 2 and above - by default, no, but an alternative called edition-based redefinition exists
Older versions of Oracle - no; DDL causes an implicit commit
SQL ...
Can a C# class inherit attributes from its interface?
...e = typeof(T);
return type.GetCustomAttributes(attributeType, true).
Union(type.GetInterfaces().
SelectMany(interfaceType => interfaceType.GetCustomAttributes(attributeType, true))).
Distinct().Cast<T>();
}
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How to check if field is null or empty in MySQL?
...uld like to check in PHP , then you should do something like :
$query_s =mysql_query("SELECT YOURROWNAME from `YOURTABLENAME` where name = $name");
$ertom=mysql_fetch_array($query_s);
if ('' !== $ertom['YOURROWNAME']) {
//do your action
echo "It was filled";
} else {
echo "it was empty!";
}...
【PM干货】2015年阿里业务型PM笔试题 - 项目管理 - 清泛网 - 专注C/C++及内核技术
...、主观题（四选二）
1、最近大数据非常的火热，而请问如何利用大数据与搜索引擎结合，为用户提供更好的产品或服务。
大致答案构成：将大数据分为几个类型，向不同的用户提供不同的类型组合构成新的产品或者服务。
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大数据时代的数据化运营 - 资讯 - 清泛网 - 专注C/C++及内核技术
...响。今天我们采访到了中清龙图副总裁李翀为广大cp讲解如何在大数据时代进行数据运营。
什么是大数据？
大数据第一个特点是数据量特别大，举个例子，比如一个人站在这里，仅知道他的身高体重等等，是没有什么实际意义...