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OPTION (RECOMPILE) is Always Faster; Why?
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淘宝应对双\"11\"的技术架构分析 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...通用的数据中间层——glider——来屏蔽这个影响。glider以HTTP协议对外提供restful方式的接口。数据产品可以通过一个唯一的URL获取到它想要的数据。
以上是淘宝海量数据产品在技术架构方面的一个概括性的介绍，接下来我将重...
How to import an excel file in to a MySQL database
...mited version, but CSV can work as well.
Use the load data capability. See http://dev.mysql.com/doc/refman/5.1/en/load-data.html
Look half way down the page, as it will gives a good example for tab separated data:
FIELDS TERMINATED BY '\t' ENCLOSED BY '' ESCAPED BY '\'
Check your data. Sometimes qu...
How to amend older Git commit? [duplicate]
...the text document
You are done, your commits are amended
credit goes to: http://git-scm.com/book/en/Git-Tools-Rewriting-History
There's also other useful demonstrated git magic.
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How to install node.js as windows service?
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@Corey I have a simple Http Node app but it cant seem to stay running using this service. It installs and starts fine, but it stops immediatelly. Any help would be greatly appreciated sir! The event viewer shows no errors, but a warning: Child proc...
What is the difference between the kernel space and the user space?
...T instruction sets the address to the current descriptor table.
See also: http://wiki.osdev.org/Global_Descriptor_Table
the segment registers CS, DS, etc., which point to the index of an entry in the GDT.
For example, CS = 0 means the first entry of the GDT is currently active for the executing co...
What's the 'Ruby way' to iterate over two arrays at once
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Extract first item of each sublist
...choose highly depends on context, readability, and preference.
More info:
https://docs.python.org/3/library/operator.html#operator.itemgetter
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How to get all possible combinations of a list’s elements?
...', 'c', 'd'],
['b', 'c', 'd'],
['a', 'b', 'c', 'd']]
Try it online:
http://ideone.com/COghfX
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R memory management / cannot allocate vector of size n Mb
...
Here is a presentation on this topic that you might find interesting:
http://www.bytemining.com/2010/08/taking-r-to-the-limit-part-ii-large-datasets-in-r/
I haven't tried the discussed things myself, but the bigmemory package seems very useful
...