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Effect of NOLOCK hint in SELECT statements
... about it by a colleague and my initial research made me question myself. SQLServer 2005 documentation says that with NOLOCK is the default locking scheme for all select statements! I'd guess then that my hints would be redundant in ...
– Bob Probst
Oct 16 '0...
phpmyadmin logs out after 1440 secs
In my local development Ubuntu box I use MySQL and phpmyadmin to work with the database.
24 Answers
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Throw an error in a MySQL trigger
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As of MySQL 5.5, you can use the SIGNAL syntax to throw an exception:
signal sqlstate '45000' set message_text = 'My Error Message';
State 45000 is a generic state representing "unhandled user-defined exception".
Here is a more...
组件美化使用指导 · App Inventor 2 中文网
...（圆角、边框保留）；为假时恢复设成透明之前的背景，包括布局的背景图片。
组件被点击（组件）（ComponentClicked）
点击 SetClickable 注册过的组件时触发。component 为被点击的组件本身。
常见问...
How can I put a database under git (version control)?
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PostGreSQL database files are binary files, feel free to put them in your git repository, you just won't be able to do any diffs on them, and any changes will most likely change the whole database and thus you now have to send the f...
PostgreSQL: How to make “case-insensitive” query
Is there any way to write case-insensitive queries in PostgreSQL, E.g. I want that following 3 queries return same result.
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Should I commit or rollback a read transaction?
...mization 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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Getting “Lock wait timeout exceeded; try restarting transaction” even though I'm not using a transac
I'm running the following MySQL UPDATE statement:
17 Answers
17
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How to change the default charset of a MySQL table?
There is a MySQL table which has this definition taken from SQLYog Enterprise :
5 Answers
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【内核源码】linux UDP实现 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...址的情况下，有可能导致单个链表的上有很多socket，导致查询慢
添加第二个hash表，使用地址和端口作为key， 来应对上述情况。 查询的时候只用查两个hash链表中较短的那个。
udp sencondary hash
connect()
sys_connect()->inet_dgram_connect...