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Efficiently convert rows to columns in sql server
I'm looking for an efficient way to convert rows to columns in SQL server, I heard that PIVOT is not very fast, and I need to deal with lot of records.
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How to align a div to the top of its parent but keeping its inline-block behaviour?
See: http://jsfiddle.net/b2BpB/1/
5 Answers
5
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Oracle “(+)” Operator
...e specific notation for an OUTER JOIN, because the ANSI-89 format (using a comma in the FROM clause to separate table references) didn't standardize OUTER joins.
The query would be re-written in ANSI-92 syntax as:
SELECT ...
FROM a
LEFT JOIN b ON b.id = a.id
This link is pretty good at e...
How to configure heroku application DNS to Godaddy Domain?
...E yourdomain.com. (note the .) and the heroku addons:add "custom domains"
http://blog.heroku.com/archives/2009/10/7/heroku_casts_setting_up_custom_domains/
To summarize the video:
1) on GoDaddy and create a CNAME with
Alias Name: www
Host Name: proxy.heroku.com
2) check that your domain has...
What's “tools:context” in Android layout files?
...s a prefix.
<android.support.v7.widget.GridLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
tools:context=".MainActivity">
Used by: Layout editors in Studio & Eclipse, Lint
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Sort JavaScript object by key
...estObj[c], a)
// initial value for reduce.
,{}
);
Docs for reduce: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/Reduce
Why use parenthesis on JavaScript return statements: http://jamesknelson.com/javascript-return-parenthesis/
Why Sorting is a bi...
How to get these two divs side-by-side?
...d_div_1 {
float: left;
margin-right: 5px;
}
Check working example at http://jsfiddle.net/c6242/1/
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Reading large text files with streams in C#
...in the buffer.
December 2014 UPDATE: Your Mileage May Vary
Based on the comments, FileStream should be using a BufferedStream internally. At the time this answer was first provided, I measured a significant performance boost by adding a BufferedStream. At the time I was targeting .NET 3.x on a 32...
Python Sets vs Lists
...at you are intending to do with it.
Sets are significantly faster when it comes to determining if an object is present in the set (as in x in s), but are slower than lists when it comes to iterating over their contents.
You can use the timeit module to see which is faster for your situation.
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Auto Generate Database Diagram MySQL [closed]
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Try MySQL Workbench, formerly DBDesigner 4:
http://dev.mysql.com/workbench/
This has a "Reverse Engineer Database" mode:
Database -> Reverse Engineer
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