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How do I rename a column in a SQLite database table?
...N fails with an error and no changes are applied.
Image source: https://www.sqlite.org/images/syntax/alter-table-stmt.gif
Example:
CREATE TABLE tab AS SELECT 1 AS c;
SELECT * FROM tab;
ALTER TABLE tab RENAME COLUMN c to c_new;
SELECT * FROM tab;
db-fiddle.com demo
Android Support
As of...
PostgreSQL: Difference between text and varchar (character varying)
...l varlena (variable length array).
Check this article from Depesz: http://www.depesz.com/index.php/2010/03/02/charx-vs-varcharx-vs-varchar-vs-text/
A couple of highlights:
To sum it all up:
char(n) – takes too much space when dealing with values shorter than n (pads them to n), and c...
Why unsigned integer is not available in PostgreSQL?
...d types. However I would suggest to use domains for unsigned types.
http://www.postgresql.org/docs/9.4/static/sql-createdomain.html
CREATE DOMAIN name [ AS ] data_type
[ COLLATE collation ]
[ DEFAULT expression ]
[ constraint [ ... ] ]
where constraint is:
[ CONSTRAINT constraint_name...
Make WPF window draggable, no matter what element is clicked
... CodeProject demonstrates one possible solution to implement this:
http://www.codeproject.com/KB/cs/DraggableForm.aspx
Basically a descendant of the Form type is created in which the mouse down, up and move events are handled.
Mouse down: remember position
Mouse move: store new location
Mous...
Regular expression to match URLs in Java
... the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIN...
Concept of void pointer in C programming
...tood what was my mistake. I am correcting the same.
References :
http://www.antoarts.com/void-pointers-in-c/
http://www.circuitstoday.com/void-pointers-in-c.
The New code is as shown below.
#include<stdio.h>
#define INT 1
#define FLOAT 2
void absolute_value ( void *j, int *n)
{
if...
How are the points in CSS specificity calculated
Researching specificity I stumbled upon this blog - http://www.htmldog.com/guides/cssadvanced/specificity/
7 Answers
...
Run php script as daemon process
...meoutSec=0
PIDFile=/var/run/myphpdaemon.pid
ExecStart=/usr/bin/php -f /srv/www/myphpdaemon.php arg1 arg2> /dev/null 2>/dev/null
#ExecStop=/bin/kill -HUP $MAINPID #It's the default you can change whats happens on stop command
#ExecReload=/bin/kill -HUP $MAINPID
KillMode=process
Restart=on-fail...
Eclipse IDE for Java - Full Dark Theme
...itors though (which isn't what you want but still merit to be mentioned):
www.eclipsecolorthemes.org:
"Fresh up your Eclipse with super-awesome color themes!"
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How to autosize a textarea using Prototype?
...lt;!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<script src="http://www.google.com/jsapi"></script>
<script language="javascript">
google.load('prototype', '1.6.0...