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Best way to get application folder path
...nstall directory.
In an ASP.NET application, this will be the application root directory, not the bin subfolder - which is probably what you usually want. In a client application, it will be the directory containing the main executable.
In a VSTO 2005 application, it will be the directory containi...
Sequelize.js delete query?
...#L207-217
https://github.com/sdepold/sequelize/blob/master/lib/connectors/mysql/query-generator.js
What I found:
There isn't a deleteAll method, there's a destroy() method you can call on a record, for example:
Project.find(123).on('success', function(project) {
project.destroy().on('success',...
Favourite performance tuning tricks [closed]
...
Assuming MySQL here, use EXPLAIN to find out what is going on with the query, make sure that the indexes are being used as efficiently as possible and try to eliminate file sorts. High Performance MySQL: Optimization, Backups, Replica...
'IF' in 'SELECT' statement - choose output value based on column values
...IF(type = 'P', amount, amount * -1) as amount
FROM report
See http://dev.mysql.com/doc/refman/5.0/en/control-flow-functions.html.
Additionally, you could handle when the condition is null. In the case of a null amount:
SELECT id,
IF(type = 'P', IFNULL(amount,0), IFNULL(amount,0) * -1) as...
List all sequences in a Postgres db 8.1 with SQL
I'm converting a db from postgres to mysql.
19 Answers
19
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在MongoDB中模拟Auto Increment - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
在MongoDB中模拟Auto IncrementMySQL用户多半都有Auto Increment情结，不过MongoDB缺省并没有实现，所以需要模拟一下，编程语言以PHP为例，代码大致如下所示：<?phpfunct...MySQL用户多半都有Auto Increment情结，不过MongoDB缺省并没有实现，所以...
Should I commit or rollback a read transaction?
...timization points for your app. If you're really curious, you can find the mySQL transaction handling code at bazaar.launchpad.net/~mysql/mysql-server/mysql-6.0/annotate/…
– Mark Brackett
May 21 '10 at 15:05
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Total memory used by Python process?
...nt sum " KB"}'
90064 KB
Attach my process list.
$ ps aux | grep python
root 943 0.0 0.1 53252 9524 ? Ss Aug19 52:01 /usr/bin/python /usr/local/bin/beaver -c /etc/beaver/beaver.conf -l /var/log/beaver.log -P /var/run/beaver.pid
root 950 0.6 0.4 299680 34220 ? Sl...
Migrating from JSF 1.2 to JSF 2.0
...braries, see also JSF2 classloading issues in application servers).
Update root declaration of faces-config.xml to comply JSF 2.0 spec.
<faces-config
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.co...
Where can I set environment variables that crontab will use?
... I like this answer +1. Could/Should this be used when running root's crontab? There is no /home/root folder on my system and so I don't see how this would work with root's crontab. Ideas?
– Seamus
Jan 29 at 23:54
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