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Reference alias (calculated in SELECT) in WHERE clause
...tly to calculate) you should probably consider a computed column (and perhaps persisted) instead, especially if a lot of queries refer to this same expression.
PS your fears seem unfounded. In this simple example at least, SQL Server is smart enough to only perform the calculation once, even though...
区块链技术到底是什么鬼，为何被疯炒？ - 资讯 - 清泛网 - 专注C/C++及内核技术
...链技术,是继蒸汽机、电力、信息和互联网科技之后,目前最有潜力触发第五轮颠覆性革命浪潮的核心技术。
过去两年,位于硅谷和纽约的区块链技术公司成为了各风投基金竞相追捧的热门项目。仅2015年,全球范围内投资在比特币...
Fast way to get image dimensions (not filesize)
...y handy
php -r "print_r(getimagesize('http://www.google.com/images/logos/ps_logo2.png'));"
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jQuery: Adding two attributes via the .attr(); method
...the explanation, that's why I chose your answer over Derek's. Thanks Adam. PS. I'll accept your answer in 7 minutes, it's not letting me accept it right now.
– Ricardo Zea
Oct 22 '12 at 15:17
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PostgreSQL: Can you create an index in the CREATE TABLE definition?
... case, for example b VARCHAR(10) NOT NULL INDEX idx_tab_b gin (b gin_trgm_ops) .. how to add more parameters without repeat column name?
– Peter Krauss
Mar 20 at 2:30
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How to link to part of the same document in Markdown?
...e, but the <a name="abcde"/> solution ought to be quite innocuous.
(PS: It might be OK to put the anchor in the line you wish to link to, as follows:
## <a name="head1">Heading One</a>
but this depends on how Markdown treats this. I note, for example, the Stack Overflow answer ...
How to clone ArrayList and also clone its contents?
...e never to
override the clone method and never to invoke it except, perhaps, to
copy arrays. If you design a class for inheritance, be aware that if
you choose not to provide a well-behaved protected clone method, it
will be impossible for subclasses to implement Cloneable.
This book also ...
How to use a different version of python during NPM install?
I have terminal access to a VPS running centos 5.9 and default python 2.4.3 installed. I also installed python 2.7.3 via these commands: (I used make altinstall instead of make install )
...
Sending and Receiving SMS and MMS in Android (pre Kit Kat Android 4.4)
...ith text. The given code works fine on a few devices that i've tested on. ps : you can ignore the NOKIA part.
– Manan Sharma
Feb 14 '13 at 13:28
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乘着App的创业浪潮 行业短信也迎来了新生和爆发 - 资讯 - 清泛网 - 专注C/C...
...验，解决消息延迟、被拦截等问题成为了行业短信面临的最大难题。
逆势崛起：验证短信迎来脱胎换骨
毫无疑问，短信正在死亡，最具有代表性的便是拜年短信。除夕是拜年短信发送的高峰，甚至会让运营商网络崩溃。然而...