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Format number to 2 decimal places
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You want to use the TRUNCATE command.
https://dev.mysql.com/doc/refman/8.0/en/mathematical-functions.html#function_truncate
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Installation Issue with matplotlib Python [duplicate]
...assume you have installed the pip matplotlib, there is a directory in your root called ~/.matplotlib.
Create a file ~/.matplotlib/matplotlibrc there and add the following code: backend: TkAgg
From this link you can try different diagrams.
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php 遍历目录批量转换文件编码 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...件编码转换为UTF-8，代码如下：< ?php php iconv.php exec it on root dir$path = dirname(__F...遍历当前目录及子目录。把所有的文件编码转换为UTF-8，代码如下：
< ?php
//php iconv.php
//exec it on root dir
$path = dirname(__FILE__);
tree($path);
function ...
How to redirect to a 404 in Rails?
... to do it yourself. If your application hijacks all of the routes from the root. It's bad design, but sometimes un-avoidable.
– ablemike
Oct 3 '11 at 13:54
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Setup RSpec to test a gem (not Rails)
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Optional: add a .rspec file for default options and put it in your gem's root path:
--color
--format documentation
Finally: run the specs:
$ rspec spec/foobar_spec.rb
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INSERT INTO … SELECT FROM … ON DUPLICATE KEY UPDATE
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MySQL will assume the part before the equals references the columns named in the INSERT INTO clause, and the second part references the SELECT columns.
INSERT INTO lee(exp_id, created_by, location, animal, starttime, endtime...
Get absolute path of initially run script
...script str_replace( basename(__FILE__) , '',str_replace($_SERVER["DOCUMENT_ROOT"],'',str_replace('\\','/',__FILE__ ) ) ) === /folder1/folder2/
– Salem
Jul 3 '16 at 3:36
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How does the SQL injection from the “Bobby Tables” XKCD comic work?
...ample, you can only run multiple statements in one SQL string by using the mysqli_multi_query function.
You can, however, manipulate an existing SQL statement via SQL injection without having to add a second statement. Let's say you have a login system which checks a username and a password with th...
creating a random number using MYSQL
I would like to know is there a way to select randomly generated number between 100 and 500 along with a select query.
6 A...
How do you run a crontab in Cygwin on Windows?
...ectory and a shell. The “/etc/passwd” file will define them.
$ mkdir /root
$ chown SYSTEM:root /root
$ mcedit /etc/passwd
SYSTEM:*:......:/root:/bin/bash
The start the service:
$ cron-config
Do you want to remove or reinstall it (yes/no) yes
Do you want to install the cron daemon as a servic...