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Simple way to calculate median with MySQL
...um:=0) r
WHERE d.val is NOT NULL
-- put some where clause here
ORDER BY d.val
) as dd
WHERE dd.row_number IN ( FLOOR((@total_rows+1)/2), FLOOR((@total_rows+2)/2) );
Steve Cohen points out, that after the first pass, @rownum will contain the total number of rows. This can be used to determin...
Is there a list of Pytz Timezones?
...ocked when I first found it out. (Interestingly enough, the pytz installed by yum on CentOS 7 does not exhibit this problem.)
import pytz
import dateutil.tz
from datetime import datetime
print((datetime(2017,2,13,14,29,29, tzinfo=pytz.timezone('Asia/Shanghai'))
- datetime(2017,2,13,14,29,29, t...
FormData.append(“key”, “value”) is not working
... thanks - this was a useful quick way to get the FormData object by typing it into the Chrome console.
– Dan Smart
Apr 20 '13 at 13:08
...
What is an uninterruptible process?
...appens to be in a system call (kernel function) that cannot be interrupted by a signal.
To understand what that means, you need to understand the concept of an interruptible system call. The classic example is read(). This is a system call that can take a long time (seconds) since it can potentiall...
Java Interfaces/Implementation naming convention [duplicate]
...ations in which you wish to simplify your code and make it easily testable by relying on injected interface implementations (which may also be proxied - your code doesn't know!). Even if you only have two implementations - one a Mock for testing, and one that gets injected into the actual productio...
How do you effectively model inheritance in a database?
.... That de-Normalisation or unnormalised is an error, is a fact, supported by theory, and experienced by millions, it is not a "presumption".
– PerformanceDBA
Apr 20 '15 at 10:37
...
Map to String in Java
...resentation consists of a list of key-value mappings in the order returned by the map's entrySet view's iterator, enclosed in braces ("{}"). Adjacent mappings are separated by the characters ", " (comma and space). Each key-value mapping is rendered as the key followed by an equals sign ("=") follow...
How do I avoid the specification of the username and password at every git push?
...d_rsa.pub into the field labeled 'Key'.
If your repository is administered by somebody else, give the administrator your id_rsa.pub.
If your remote repository is administered by your, you can use this command for example:
scp ~/.ssh/id_rsa.pub YOUR_USER@YOUR_IP:~/.ssh/authorized_keys/id_rsa.pub
...
Difference between “module.exports” and “exports” in the CommonJs Module System
...lows:
(function (exports, require, module, __filename, __dirname) { //add by node
var greet = function () {
console.log('Hello World');
};
module.exports = greet;
}).apply(); //add by node
return module.exports; ...
Cannot open database “test” requested by the login. The login failed. Login failed for user 'xyz\ASP
...ccount in your connection string.
Can you show us your connection string (by updating your original question)?
UPDATE: Ok, you're using integrated Windows authentication --> you need to create a SQL Server login for "xyz\ASPNET" on your SQL Server - or change your connection string to something...