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MongoDB or CouchDB - fit for production? [closed]
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We are running CouchDB as a replacemant for MySQL for our shops (70.0000 items/shop, a total of 4 million attributes of all items, cross connections between items).
Our goals were:
Easy replication from a master-db to several clients with different documents.
Fast p...
How to get ER model of database from server with Workbench
...y to get an ER model of a database from the server that is connected to my MySQL Workbench?
4 Answers
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MySQL, better to insert NULL or empty string?
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Better to Insert NULL for consistency in your database in MySQL. Foreign keys can be stored as NULL but NOT as empty strings.
You will have issues with an empty string in the constraints.
You may have to insert a fake record with a unique empty string to satisfy a Foreign Key cons...
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.
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How to implement a tree data-structure in Java? [closed]
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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 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*...
MySQL join with where clause
....new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f1219909%2fmysql-join-with-where-clause%23new-answer', 'question_page');
}
);
Post as a guest
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How can I get a web site's favicon?
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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...
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...
Unknown Column In Where Clause
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See the following MySQL manual page: http://dev.mysql.com/doc/refman/5.0/en/select.html
"A select_expr can be given an alias
using AS alias_name. The alias is used
as the expression's column name and
can be used in GROUP BY, ORDER BY...