大约有 40,000 项符合查询结果（耗时：0.0494秒） [XML]
COUNT(*) vs. COUNT(1) vs. COUNT(pk): which is better? [duplicate]
...ike (just don't make a column with a name same as its table name) : http://www.sqlfiddle.com/#!1/98515/7
select boss.boss_name, count(subordinate)
from boss
left join subordinate on subordinate.boss_code = boss.boss_code
group by boss.boss_name
You cannot do this: http://www.sqlfiddle.com/#!1/985...
Using an RDBMS as event sourcing storage
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The GitHub project CQRS.NET has a few concrete examples of how you could do EventStores in a few different technologies. At time of writing there is an implementation in SQL using Linq2SQL and a SQL schema to go with it, there's one for MongoDB, one...
How to simulate target=“_blank” in JavaScript
...
<script>
window.open('http://www.example.com?ReportID=1', '_blank');
</script>
The second parameter is optional and is the name of the target window.
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How to convert SSH keypairs generated using PuTTYgen (Windows) into key-pairs used by ssh-agent and
...keygen -i -f keyfile.pub > newkeyfile.pub
References
Source: http://www.treslervania.com/node/408
Mirror: https://web.archive.org/web/20120414040727/http://www.treslervania.com/node/408.
Copy of article
I keep forgetting this so I'm gonna write it here. Non-geeks, just
keep walking.
...
Facebook development in localhost
...lect website)
Set the Site URL field (NOT the App Domains field) to http://www.localhost:3000 (this address is for Ruby on Rails, change as needed)
In your application initializer, put in code to detect the environment
Sample Rails 3 code
if Rails.env == 'development' || Rails.env == 't...
Visual Studio: Is there a way to collapse all items of Solution Explorer?
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There's a macro at http://geekswithblogs.net/scottkuhl/archive/2007/04/09/111195.aspx for Visual Studio 2005.
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How to get parameters from a URL string?
...d 'query' - there you can find your email parameter. More info: http://php.net/manual/en/function.parse-url.php
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Facebook Open Graph not clearing cache
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Enter the URL following by fbrefresh=CAN_BE_ANYTHING
Examples:
http://www.example.com?fbrefresh=CAN_BE_ANYTHING
http://www.example.com?postid=1234&fbrefresh=CAN_BE_ANYTHING
OR visit:
http://developers.facebook.com/tools/debug/og/object?q=http://www.example.com/?p=3568&fbrefresh=89127348...
How do I get the n-th level parent of an element in jQuery?
...our looking for you can use the .parents() selector.
E.G:
http://jsfiddle.net/HenryGarle/Kyp5g/2/
<div id="One">
<div id="Two">
<div id="Three">
<div id="Four">
</div>
</div>
</div>
</div>
var top = ...
Difference between application/x-javascript and text/javascript content types
...etely correct mime-type for javascript is
application/javascript
http://www.iana.org/assignments/media-types/application/index.html
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