大约有 7,000 项符合查询结果（耗时：0.0263秒） [XML]
Oracle取前N条记录方法 Oracle实现SELECT TOP N的方法 - 数据库(内核) - 清...
...from tablexxx order by xxx desc ) where rownum <= Noracle数据库不支持mysql中limit, top功...select * from ( select * from tablexxx order by xxx desc ) where rownum <= N
oracle数据库不支持mysql中limit, top功能,但可以通过rownum来限制返回的结果集的行数,rownum并不...
Postfix日常维护队列管理 - 更多技术 - 清泛网 - 专注C/C++及内核技术
.../local/httpd/logs/error_log tail -f /usr/local/httpd/logs/suexec_log
mysql相关：tail -f /usr/local/mysql/data/linux.linux.com.err
测试amavisd：amavisd -d config debug-sa
测试spam：spamassassin -D --lint
测试maildrop：maildrop -V 10 -dtest@test.com
Postfix 维护 队列
PHP的函数前加上“@”的作用 - PHP - 清泛IT论坛，有思想、有深度
@是PHP提供的错误信息屏蔽的专用符号。
比如在一个函数前使用@
@mysql_query 不会出现Warning，
而原来mysql_query 在遇到错误时会在页面上访提示Warning。
Simplest way to profile a PHP script
... all the data
$select_query = "SELECT * FROM data_table";
$result = mysql_query($select_query);
prof_flag("Retrieve data");
$rows = array();
$found_data=false;
while($r = mysql_fetch_assoc($result))
{
$found_data=true;
$rows[] = $r;
}
prof_flag("Close DB");
...
How can I implement a tree in Python?
... self.right = None
self.data = None
You can use it like this:
root = Tree()
root.data = "root"
root.left = Tree()
root.left.data = "left"
root.right = Tree()
root.right.data = "right"
If you need an arbitrary number of children per node, then use a list of children:
class Tree:
def...
Rails Root directory path?
How do I get my Rails app's root directory path?
9 Answers
9
...
基于PECL OAuth打造微博应用 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...last_response = null;
return $instance;
}
?>
先看看搜狐是如何发送文本加图片消息的：
<?php
$text = 'hello, world.';
$image = 'http://www.foo.com/bar.gif';
$oauth = OAuth(
'YOUR_CONSUMER_KEY',
'YOUR_CONSUMER_SECRET',
OAUTH_SIG_METHOD_HMACSHA1,
...
How long is the SHA256 hash?
...+ salt, but I don't know how long to make my VARCHAR when setting up the MySQL database. What is a good length?
5 Answers...
SQLAlchemy IN clause
...is using raw SQL mode with SQLAlchemy, I use SQLAlchemy 0.9.8, python 2.7, MySQL 5.X, and MySQL-Python as connector, in this case, a tuple is needed. My code listed below:
id_list = [1, 2, 3, 4, 5] # in most case we have an integer list or set
s = text('SELECT id, content FROM myTable WHERE id IN :...
What's an Aggregate Root?
...o properly use the repository pattern. The central concept of an Aggregate Root keeps coming up. When searching both the web and Stack Overflow for help with what an aggregate root is, I keep finding discussions about them and dead links to pages that are supposed to contain base definitions.
...