大约有 19,000 项符合查询结果（耗时：0.0338秒） [XML]
How to create a multi-tenant database with shared table structures?
Our software currently runs on MySQL. The data of all tenants is stored in the same schema. Since we are using Ruby on Rails we can easily determine which data belongs to which tenant. However there are some companies of course who fear that their data might be compromised, so we are evaluating othe...
boost多索引容器multi_index_container实战 - C/C++ - 清泛网 - 专注C/C++及内核技术
...些知识有过了解
什么是多索引容器？为什么要使用它？如何使用？
接下来一一回答以上的问题。
想必大家在实际开发中一定多多少少会遇到以下的问题，我需要创建一个map，并且需要两种方式去索引，比如：创建一个<学号,...
How to implement a tree data-structure in Java? [closed]
...
Here:
public class Tree<T> {
private Node<T> root;
public Tree(T rootData) {
root = new Node<T>();
root.data = rootData;
root.children = new ArrayList<Node<T>>();
}
public static class Node<T> {
priva...
How to use SSH to run a local shell script on a remote machine?
...rameter, and it will execute the local script on the remote server.
plink root@MachineB -m local_script.sh
If Machine A is a Unix-based system, you can use:
ssh root@MachineB 'bash -s' < local_script.sh
You shouldn't have to copy the script to the remote server to run it.
...
How to check whether a script is running under Node.js?
...it:
Edit: to your updated question:
(function () {
// Establish the root object, `window` in the browser, or `global` on the server.
var root = this;
// Create a reference to this
var _ = new Object();
var isNode = false;
// Export the Underscore object for **CommonJS*...
SQL Group By with an Order By
...
In all versions of MySQL, simply alias the aggregate in the SELECT list, and order by the alias:
SELECT COUNT(id) AS theCount, `Tag` from `images-tags`
GROUP BY `Tag`
ORDER BY theCount DESC
LIMIT 20
...
Difference between scaling horizontally and vertically for databases [closed]
...MongoDB, Google Cloud Spanner .. and a good example of vertical scaling is MySQL - Amazon RDS (The cloud version of MySQL). It provides an easy way to scale vertically by switching from small to bigger machines. This process often involves downtime.
In-Memory Data Grids such as GigaSpaces XAP, Coher...
How can I get a web site's favicon?
...
You'll want to tackle this a few ways:
Look for the favicon.ico at the root of the domain
www.domain.com/favicon.ico
Look for a <link> tag with the rel="shortcut icon" attribute
<link rel="shortcut icon" href="/favicon.ico" />
Look for a <link> tag with the rel="icon" attribu...
Laravel Eloquent ORM Transactions
...t ORM is quite nice, though I'm wondering if there is an easy way to setup MySQL transactions using innoDB in the same fashion as PDO, or if I would have to extend the ORM to make this possible?
...
Is there a good reason I see VARCHAR(255) used so often (as opposed to another length)?
...
@CharlesBretana: By "fake UTF-8" I mean MySQL's "utf8" encoding, which as I mentioned reserves (and is limited to) 3 bytes per character. This isn't a very good version of UTF-8; if you want decent UTF-8 in MySQL, you have to use its "utf8mb4" encoding. But peopl...