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How do I get SUM function in MySQL to return '0' if no values are found?
...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 nulls, and one with a mixture):
SQL Fiddle
MySQL 5.5.32 Schema Setup:
CREATE TABLE foo
(
id INT NOT N...
Large Numbers in Java
...
Use the BigInteger class that is a part of the Java library.
http://java.sun.com/j2se/1.5.0/docs/api/java/math/BigInteger.html
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Exit codes in Python
...re.
Example:
import sys, os
try:
config()
except:
sys.exit(os.EX_CONFIG)
try:
do_stuff()
except:
sys.exit(os.EX_SOFTWARE)
sys.exit(os.EX_OK) # code 0, all ok
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How to simulate a mouse click using JavaScript?
...rties you want to give it */
});
targetElement.dispatchEvent(evt);
Demo: http://jsfiddle.net/DerekL/932wyok6/
This works on all modern browsers. For old browsers including IE, MouseEvent.initMouseEvent will have to be used unfortunately though it's deprecated.
var evt = document.createEvent("Mo...
How do I convert a hexadecimal color to rgba with the Less compiler?
...fade(@baseColor, 100%)
/* color:#d14836; */
}
Test this code online: http://lesstester.com/
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Node.js vs .Net performance
...you start making I/O requests that block the thread (call to a DB, make an http request to a service, read a file from disk). These blocking requests mean that your valuable thread from the thread pool is doing nothing. The more blocking you have, the less LOAD your ASP.NET app is going to be able t...
What is a tracking branch?
...nd branches. This often referenced link web.archive.org/web/20130419172453/http://www.gitguys.com/… distinguishes between "tracking branches" & "remote tracking branches". They call origin/master a "remote tracking branch" - I agree - but then they call "master" a "tracking branch" too. What i...
How to extract public key using OpenSSL?
....
I did find in the AWS docs the following command works:
ssh-keygen -y
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-key-pairs.html
edit
Thanks @makenova for the complete line:
ssh-keygen -y -f key.pem > key.pub
...
How to Avoid Response.End() “Thread was being aborted” Exception during the Excel file download
...and saw that the Response.End() always throws an exception.
Replace this: HttpContext.Current.Response.End();
With this:
HttpContext.Current.Response.Flush(); // Sends all currently buffered output to the client.
HttpContext.Current.Response.SuppressContent = true; // Gets or sets a value indica...
Hibernate dialect for Oracle Database 11g?
...1g is same as Oracle 10g (org.hibernate.dialect.Oracle10gDialect). Source: http://docs.jboss.org/hibernate/orm/3.6/reference/en-US/html/session-configuration.html#configuration-optional-dialects
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