大约有 19,000 项符合查询结果（耗时：0.0342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。
What is the difference between an ORM and an ODM?
...(Object Document Mapper) deals with documents. Am I right in assuming that mySQL is an example of ORM and MongoDB is a example of ODM?
...
Python - Create a list with initial capacity
... 0.0098
Conclusion. It barely matters.
Premature optimization is the root of all evil.
share
|
improve this answer
|
follow
|
...
This app won't run unless you update Google Play Services (via Bazaar)
...ther. It probably would work if I knew exactly which APKs to copy from my rooted device.
– James Wald
Dec 5 '12 at 4:28
add a comment
|
...
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...
Socket send函数和recv函数详解以及利用select()函数来进行指定时间的阻塞 ...
...有情况下，发送开始调用是局部的：无论其它进程的状态如何，它立刻返回。如果这个调用使得一些系统资源用完，那么它将失败并返回 一个错误代码。高质量的MPI实现应保证这种情况只在“病态”时发生。即，一个MPI实现将...
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.
...
Return XML from a controller's action in as an ActionResult?
... @pcampbel, I prefer creating separate folders in my project root for every kind of classes: Results, Filters, Routing, etc.
– Anthony Serdyukov
Apr 6 '10 at 2:32
...