大约有 19,000 项符合查询结果（耗时：0.0370秒） [XML]
Best practices for SQL varchar column length [closed]
... table's varchar column. But I could not find any reference for that.
For MySQL the manual says "In most cases, ALTER TABLE makes a temporary copy of the original table". And my own tests confirm that: running an ALTER TABLE on a table with 1.2 million rows (the same as in my test with Postgres) to...
How to change current working directory using a batch file
...need some help in writing a batch file.
I have a path stored in a variable root as follows:
4 Answers
...
PHP的函数前加上“@”的作用 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...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。@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...
Curses library not found. Please install appropriate package - 更多...
Curses library not found. Please install appropriate packageCentOS安装MySql报错：-- Could NOT find Curses (missing: CURSES_LIBRARY CURSES_INCLUDE_PATH)CMake Error at cmake readli...CentOS安装MySql报错：
-- Could NOT find Curses (missing: CURSES_LIBRARY CURSES_INCLUDE_PATH)
CMake Err...
LIMIT 10..20 in SQL Server
... not part of standard SQL. It's supported as a vendor extension to SQL by MySQL, PostgreSQL, and SQLite.
Other brands of database may have similar features (e.g. TOP in Microsoft SQL Server), but these don't always work identically.
It's hard to use TOP in Microsoft SQL Server to mimic the LIMI...
Error pushing to GitHub - insufficient permission for adding an object to repository database
...new files created by another user to maintain the group permissions of the root directory. Otherwise, you'll have errors pushing up to the repository. See setuid and setgid
– syvex
Jul 7 '11 at 17:05
...
ZMQ: 基本原理 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...。
本文的目的是解释ØMQ架构的基本概念，它们是如何组合起来的，以及它们被如此设计的原因。
拓扑
拓扑是ØMQ最主要的概念，除非你知道“拓扑”代表什么，否则将与其他概念混淆更难...
ZMQ: 基本原理 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...。
本文的目的是解释ØMQ架构的基本概念，它们是如何组合起来的，以及它们被如此设计的原因。
拓扑
拓扑是ØMQ最主要的概念，除非你知道“拓扑”代表什么，否则将与其他概念混淆更难...
How to get Twitter-Bootstrap navigation to show active link?
... HAML implementation %li{:class => "#{'active' if current_page?(root_path)}"}=link_to "Home", root_path
– Brian
Feb 18 '13 at 0:44
...
Resolving javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path
...TPS SSL certificate, and our older version of java doesn’t recognize the root certificate authority (CA).
• If you can access the HTTPS URL in your browser then it is possible to update Java to recognize the root CA.
• In your browser, go to the HTTPS URL that Java could not access. Click on t...